diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8ce50c4..fd2922f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -25,6 +25,11 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".AddAccountActivity"
+            android:exported="false"
+            android:label="Add Account"
+            android:theme="@style/Theme.GridFlow.NoActionBar" />
         <activity
             android:name=".DebugLoginActivity"
             android:exported="false"
diff --git a/app/src/main/java/sh/sar/gridflow/AddAccountActivity.kt b/app/src/main/java/sh/sar/gridflow/AddAccountActivity.kt
new file mode 100644
index 0000000..673913b
--- /dev/null
+++ b/app/src/main/java/sh/sar/gridflow/AddAccountActivity.kt
@@ -0,0 +1,219 @@
+package sh.sar.gridflow
+
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.launch
+import sh.sar.gridflow.databinding.ActivityAddAccountBinding
+import sh.sar.gridflow.network.ApiResult
+import sh.sar.gridflow.network.FenakaApiService
+import sh.sar.gridflow.utils.Account
+import sh.sar.gridflow.utils.SecureStorage
+
+class AddAccountActivity : AppCompatActivity() {
+    
+    private lateinit var binding: ActivityAddAccountBinding
+    private lateinit var secureStorage: SecureStorage
+    private lateinit var apiService: FenakaApiService
+    
+    companion object {
+        private const val TAG = "AddAccountActivity"
+    }
+    
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        
+        // Force system theme (follows device dark mode setting)
+        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM)
+        
+        Log.d(TAG, "AddAccountActivity onCreate")
+        
+        binding = ActivityAddAccountBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        
+        // Set up the toolbar
+        setSupportActionBar(binding.toolbar)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+        supportActionBar?.title = "Add Account"
+        
+        try {
+            secureStorage = SecureStorage(this)
+            apiService = FenakaApiService()
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to initialize SecureStorage, continuing without it", e)
+            apiService = FenakaApiService()
+            Toast.makeText(this, "Warning: Secure storage not available", Toast.LENGTH_SHORT).show()
+        }
+        
+        setupClickListeners()
+    }
+    
+    override fun onSupportNavigateUp(): Boolean {
+        onBackPressed()
+        return true
+    }
+    
+    private fun setupClickListeners() {
+        binding.btnSignIn.setOnClickListener {
+            handleSignIn()
+        }
+        
+        binding.btnRegister.setOnClickListener {
+            handleRegister()
+        }
+        
+        binding.btnForgotPassword.setOnClickListener {
+            handleForgotPassword()
+        }
+    }
+    
+    private fun showLoginError(message: String) {
+        val dialog = androidx.appcompat.app.AlertDialog.Builder(this)
+            .setTitle("Login Failed")
+            .setMessage(message)
+            .setPositiveButton("Retry") { _, _ ->
+                // Retry the login with the same credentials
+                handleSignIn()
+            }
+            .setNegativeButton("Cancel") { dialog, _ ->
+                dialog.dismiss()
+            }
+            .setCancelable(true)
+            .create()
+            
+        dialog.show()
+    }
+    
+    private fun handleSignIn() {
+        val mobileNumber = binding.etMobileNumber.text.toString().trim()
+        val password = binding.etPassword.text.toString().trim()
+        
+        Log.d(TAG, "handleSignIn called with mobile: $mobileNumber")
+        
+        if (validateInput(mobileNumber, password)) {
+            Log.d(TAG, "Input validation passed, calling performLogin")
+            performLogin(mobileNumber, password)
+        } else {
+            Log.d(TAG, "Input validation failed")
+        }
+    }
+    
+    private fun performLogin(mobile: String, password: String) {
+        Log.d(TAG, "performLogin called with mobile: $mobile")
+        
+        // Check if account already exists
+        val existingAccounts = secureStorage.getAllAccounts()
+        if (existingAccounts.any { it.mobile == mobile }) {
+            Toast.makeText(this, "Account already exists", Toast.LENGTH_SHORT).show()
+            return
+        }
+        
+        setLoading(true)
+        
+        lifecycleScope.launch {
+            Log.d(TAG, "Starting coroutine for API call")
+            try {
+                when (val result = apiService.login(mobile, password)) {
+                    is ApiResult.Success -> {
+                        Log.d(TAG, "Login successful: ${result.data}")
+                        
+                        // Create new account object
+                        val newAccount = Account(
+                            id = mobile,
+                            name = result.data.name,
+                            mobile = mobile,
+                            email = result.data.email,
+                            password = password,
+                            cookie = extractSessionId(result.cookie ?: ""),
+                            userId = result.data.id,
+                            isActive = false // Will be set as active when switched to
+                        )
+                        
+                        // Save the new account
+                        secureStorage.saveAccount(newAccount)
+                        
+                        setLoading(false)
+                        
+                        // Show success message and finish
+                        Toast.makeText(this@AddAccountActivity, "Account added successfully", Toast.LENGTH_SHORT).show()
+                        
+                        // Return to main activity
+                        val intent = Intent(this@AddAccountActivity, MainActivity::class.java)
+                        intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
+                        startActivity(intent)
+                        finish()
+                    }
+                    is ApiResult.Error -> {
+                        Log.d(TAG, "Login failed: ${result.message} (code: ${result.code})")
+                        setLoading(false)
+                        showLoginError(result.message)
+                    }
+                }
+            } catch (e: Exception) {
+                Log.e(TAG, "Exception in performLogin coroutine", e)
+                setLoading(false)
+                showLoginError("Login failed: ${e.message}")
+            }
+        }
+    }
+    
+    private fun extractSessionId(setCookieHeader: String): String {
+        // Extract the session ID from Set-Cookie header
+        return setCookieHeader.substringBefore(";").substringAfter("connect.sid=")
+    }
+    
+    private fun setLoading(isLoading: Boolean) {
+        binding.btnSignIn.isEnabled = !isLoading
+        binding.btnSignIn.text = if (isLoading) "Signing in..." else "Sign In"
+        
+        // Disable other buttons during loading
+        binding.btnRegister.isEnabled = !isLoading
+        binding.btnForgotPassword.isEnabled = !isLoading
+        
+        // Show/hide progress indicator
+        binding.etMobileNumber.isEnabled = !isLoading
+        binding.etPassword.isEnabled = !isLoading
+    }
+    
+    private fun handleRegister() {
+        Log.d(TAG, "Register button clicked")
+        val intent = Intent(this, RegisterActivity::class.java)
+        startActivity(intent)
+    }
+    
+    private fun handleForgotPassword() {
+        Log.d(TAG, "Forgot password button clicked")
+        val intent = Intent(this, ForgotPasswordActivity::class.java)
+        startActivity(intent)
+    }
+    
+    private fun validateInput(mobileNumber: String, password: String): Boolean {
+        if (mobileNumber.isEmpty()) {
+            binding.etMobileNumber.error = "Mobile number is required"
+            return false
+        }
+        
+        if (password.isEmpty()) {
+            binding.etPassword.error = "Password is required"
+            return false
+        }
+        
+        // Client-side password validation - must be at least 8 characters
+        if (password.length < 8) {
+            binding.etPassword.error = "Password must be at least 8 characters"
+            return false
+        }
+        
+        // Basic Maldives mobile number validation (7xxxxxx format)
+        if (!mobileNumber.matches(Regex("^[79]\\d{6}$"))) {
+            binding.etMobileNumber.error = "Enter a valid Maldives mobile number"
+            return false
+        }
+        
+        return true
+    }
+}
diff --git a/app/src/main/java/sh/sar/gridflow/LoginActivity.kt b/app/src/main/java/sh/sar/gridflow/LoginActivity.kt
index 8e74b09..dd59ff1 100644
--- a/app/src/main/java/sh/sar/gridflow/LoginActivity.kt
+++ b/app/src/main/java/sh/sar/gridflow/LoginActivity.kt
@@ -12,6 +12,7 @@ import kotlinx.coroutines.launch
 import sh.sar.gridflow.databinding.ActivityLoginBinding
 import sh.sar.gridflow.network.ApiResult
 import sh.sar.gridflow.network.FenakaApiService
+import sh.sar.gridflow.utils.Account
 import sh.sar.gridflow.utils.SecureStorage
 
 class LoginActivity : AppCompatActivity() {
@@ -124,19 +125,21 @@ class LoginActivity : AppCompatActivity() {
                         // Save credentials and user info (if SecureStorage is available)
                         if (this@LoginActivity::secureStorage.isInitialized) {
                             try {
-                                secureStorage.saveCredentials(mobile, password)
-                                secureStorage.saveUserInfo(
-                                    result.data.name,
-                                    result.data.email,
-                                    result.data.id
+                                // Create new account object
+                                val newAccount = Account(
+                                    id = mobile,
+                                    name = result.data.name,
+                                    mobile = mobile,
+                                    email = result.data.email,
+                                    password = password,
+                                    cookie = extractSessionId(result.cookie ?: ""),
+                                    userId = result.data.id,
+                                    isActive = true
                                 )
                                 
-                                // Extract and save cookie
-                                result.cookie?.let { cookie ->
-                                    val sessionId = extractSessionId(cookie)
-                                    Log.d(TAG, "Extracted session ID: $sessionId")
-                                    secureStorage.saveCookie(sessionId)
-                                }
+                                // Save the account and set as active
+                                secureStorage.saveAccount(newAccount)
+                                secureStorage.setActiveAccount(mobile)
                             } catch (e: Exception) {
                                 Log.e(TAG, "Failed to save credentials securely", e)
                             }
diff --git a/app/src/main/java/sh/sar/gridflow/MainActivity.kt b/app/src/main/java/sh/sar/gridflow/MainActivity.kt
index 64feec9..f7de399 100644
--- a/app/src/main/java/sh/sar/gridflow/MainActivity.kt
+++ b/app/src/main/java/sh/sar/gridflow/MainActivity.kt
@@ -1,10 +1,14 @@
 package sh.sar.gridflow
 
+import android.animation.ObjectAnimator
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
+import android.view.View
+import android.widget.ImageView
+import android.widget.LinearLayout
 import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
@@ -14,8 +18,11 @@ import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.setupActionBarWithNavController
 import androidx.navigation.ui.setupWithNavController
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.navigation.NavigationView
 import sh.sar.gridflow.databinding.ActivityMainBinding
+import sh.sar.gridflow.ui.accounts.AccountsAdapter
 import sh.sar.gridflow.utils.SecureStorage
 
 class MainActivity : AppCompatActivity() {
@@ -23,6 +30,14 @@ class MainActivity : AppCompatActivity() {
     private lateinit var appBarConfiguration: AppBarConfiguration
     private lateinit var binding: ActivityMainBinding
     private lateinit var secureStorage: SecureStorage
+    private lateinit var accountsAdapter: AccountsAdapter
+    
+    private lateinit var accountSwitcherArrow: ImageView
+    private lateinit var accountListSection: LinearLayout
+    private lateinit var addAccountButton: LinearLayout
+    private lateinit var accountsRecyclerView: RecyclerView
+    
+    private var isAccountListVisible = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -41,6 +56,9 @@ class MainActivity : AppCompatActivity() {
         val navView: NavigationView = binding.navView
         val navController = findNavController(R.id.nav_host_fragment_content_main)
         
+        // Initialize navigation header components
+        initializeNavigationHeader(navView)
+        
         // Update navigation header with user info
         updateNavHeader(navView)
         
@@ -48,9 +66,9 @@ class MainActivity : AppCompatActivity() {
         appBarConfiguration = AppBarConfiguration(
             setOf(
                 R.id.nav_dashboard, 
+                R.id.nav_bill_history, 
                 R.id.nav_subscriptions, 
                 R.id.nav_band_rates, 
-                R.id.nav_bill_history, 
                 R.id.nav_pay_any_bill
             ), drawerLayout
         )
@@ -85,6 +103,133 @@ class MainActivity : AppCompatActivity() {
         }
     }
     
+    private fun initializeNavigationHeader(navView: NavigationView) {
+        val headerView = navView.getHeaderView(0)
+        
+        try {
+            accountSwitcherArrow = headerView.findViewById(R.id.account_switcher_arrow)
+            accountListSection = headerView.findViewById(R.id.account_list_section)
+            addAccountButton = headerView.findViewById(R.id.add_account_button)
+            accountsRecyclerView = headerView.findViewById(R.id.accounts_recycler_view)
+            
+            android.util.Log.d("MainActivity", "Navigation header views initialized successfully")
+            
+            // Set theme-appropriate background for account list
+            setAccountListTheme()
+            
+            // Set up RecyclerView for accounts
+            accountsRecyclerView.layoutManager = LinearLayoutManager(this)
+            accountsAdapter = AccountsAdapter(
+                accounts = emptyList(),
+                activeAccountId = null,
+                onAccountClick = { account ->
+                    switchToAccount(account.id)
+                    toggleAccountList(false)
+                }
+            )
+            accountsRecyclerView.adapter = accountsAdapter
+            
+            // Set up click listeners
+            accountSwitcherArrow.setOnClickListener {
+                android.util.Log.d("MainActivity", "Account switcher arrow clicked")
+                toggleAccountList()
+            }
+            
+            addAccountButton.setOnClickListener {
+                android.util.Log.d("MainActivity", "Add account button clicked")
+                val intent = Intent(this, AddAccountActivity::class.java)
+                startActivity(intent)
+            }
+            
+            android.util.Log.d("MainActivity", "Click listeners set up successfully")
+            
+        } catch (e: Exception) {
+            android.util.Log.e("MainActivity", "Error initializing navigation header", e)
+        }
+    }
+    
+    private fun setAccountListTheme() {
+        // Check if we're in dark mode
+        val nightModeFlags = resources.configuration.uiMode and android.content.res.Configuration.UI_MODE_NIGHT_MASK
+        val headerView = binding.navView.getHeaderView(0)
+        
+        when (nightModeFlags) {
+            android.content.res.Configuration.UI_MODE_NIGHT_YES -> {
+                // Dark theme - use darker background
+                accountListSection.setBackgroundColor(android.graphics.Color.parseColor("#2C2C2C"))
+                
+                // Update divider color for dark theme
+                val divider = headerView.findViewById<View>(R.id.account_list_divider)
+                divider?.setBackgroundColor(android.graphics.Color.parseColor("#555555"))
+            }
+            android.content.res.Configuration.UI_MODE_NIGHT_NO -> {
+                // Light theme - use white background
+                accountListSection.setBackgroundColor(android.graphics.Color.WHITE)
+                
+                // Update divider color for light theme
+                val divider = headerView.findViewById<View>(R.id.account_list_divider)
+                divider?.setBackgroundColor(android.graphics.Color.parseColor("#E0E0E0"))
+            }
+            else -> {
+                // Default to white
+                accountListSection.setBackgroundColor(android.graphics.Color.WHITE)
+            }
+        }
+    }
+    
+    private fun toggleAccountList(forceState: Boolean? = null) {
+        val targetVisibility = forceState ?: !isAccountListVisible
+        
+        if (targetVisibility) {
+            // Show account list
+            updateAccountsList()
+            accountListSection.visibility = View.VISIBLE
+            isAccountListVisible = true
+            
+            // Rotate arrow down
+            ObjectAnimator.ofFloat(accountSwitcherArrow, "rotation", 0f, 180f).apply {
+                duration = 200
+                start()
+            }
+        } else {
+            // Hide account list
+            accountListSection.visibility = View.GONE
+            isAccountListVisible = false
+            
+            // Rotate arrow up
+            ObjectAnimator.ofFloat(accountSwitcherArrow, "rotation", 180f, 0f).apply {
+                duration = 200
+                start()
+            }
+        }
+    }
+    
+    private fun updateAccountsList() {
+        val allAccounts = secureStorage.getAllAccounts()
+        val activeAccount = secureStorage.getActiveAccount()
+        
+        // Show only other accounts (not the currently active one)
+        val otherAccounts = allAccounts.filter { it.id != activeAccount?.id }
+        
+        accountsAdapter.updateAccounts(otherAccounts, activeAccount?.id)
+        
+        // Show/hide add account button based on whether we have multiple accounts
+        addAccountButton.visibility = View.VISIBLE
+    }
+    
+    private fun switchToAccount(accountId: String) {
+        android.util.Log.d("MainActivity", "Switching to account: $accountId")
+        secureStorage.setActiveAccount(accountId)
+        updateNavHeader(binding.navView)
+        
+        // Navigate to dashboard to show selected account data
+        val navController = findNavController(R.id.nav_host_fragment_content_main)
+        navController.navigate(R.id.nav_dashboard)
+        
+        // Close the drawer
+        binding.drawerLayout.closeDrawers()
+    }
+    
     private fun openUrl(url: String) {
         val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
         startActivity(intent)
@@ -96,10 +241,22 @@ class MainActivity : AppCompatActivity() {
         val mobileTextView = headerView.findViewById<TextView>(R.id.nav_header_mobile)
         val emailTextView = headerView.findViewById<TextView>(R.id.nav_header_email)
         
-        // Load user info from secure storage
-        nameTextView.text = secureStorage.getUserName() ?: "User"
-        mobileTextView.text = secureStorage.getMobile() ?: ""
-        emailTextView.text = secureStorage.getUserEmail() ?: ""
+        // Load user info from secure storage (active account)
+        val activeAccount = secureStorage.getActiveAccount()
+        nameTextView.text = activeAccount?.name ?: "User"
+        mobileTextView.text = activeAccount?.mobile ?: ""
+        emailTextView.text = activeAccount?.email ?: ""
+        
+        // Always show account switcher arrow for now (for testing)
+        // Will hide it only when we're sure there's only one account
+        val allAccounts = secureStorage.getAllAccounts()
+        val hasMultipleAccounts = allAccounts.size > 1
+        
+        // For debugging: always show the arrow initially
+        accountSwitcherArrow.visibility = View.VISIBLE
+        
+        // Log for debugging
+        android.util.Log.d("MainActivity", "Total accounts: ${allAccounts.size}, Active: ${activeAccount?.mobile}")
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -112,4 +269,10 @@ class MainActivity : AppCompatActivity() {
         val navController = findNavController(R.id.nav_host_fragment_content_main)
         return navController.navigateUp(appBarConfiguration) || super.onSupportNavigateUp()
     }
+    
+    override fun onResume() {
+        super.onResume()
+        // Update navigation header in case accounts were added/removed
+        updateNavHeader(binding.navView)
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/sh/sar/gridflow/ui/accounts/AccountsAdapter.kt b/app/src/main/java/sh/sar/gridflow/ui/accounts/AccountsAdapter.kt
new file mode 100644
index 0000000..ca8c7e7
--- /dev/null
+++ b/app/src/main/java/sh/sar/gridflow/ui/accounts/AccountsAdapter.kt
@@ -0,0 +1,71 @@
+package sh.sar.gridflow.ui.accounts
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import sh.sar.gridflow.R
+import sh.sar.gridflow.utils.Account
+
+class AccountsAdapter(
+    private var accounts: List<Account>,
+    private var activeAccountId: String?,
+    private val onAccountClick: (Account) -> Unit
+) : RecyclerView.Adapter<AccountsAdapter.AccountViewHolder>() {
+
+    class AccountViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val accountName: TextView = itemView.findViewById(R.id.account_name)
+        val accountMobile: TextView = itemView.findViewById(R.id.account_mobile)
+        val activeIndicator: ImageView = itemView.findViewById(R.id.active_indicator)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AccountViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(R.layout.item_account, parent, false)
+        return AccountViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: AccountViewHolder, position: Int) {
+        val account = accounts[position]
+        
+        holder.accountName.text = account.name
+        holder.accountMobile.text = account.mobile
+        
+        // Set theme-appropriate text colors
+        val context = holder.itemView.context
+        val nightModeFlags = context.resources.configuration.uiMode and android.content.res.Configuration.UI_MODE_NIGHT_MASK
+        when (nightModeFlags) {
+            android.content.res.Configuration.UI_MODE_NIGHT_YES -> {
+                // Dark theme - use light text
+                holder.accountName.setTextColor(android.graphics.Color.WHITE)
+                holder.accountMobile.setTextColor(android.graphics.Color.parseColor("#CCCCCC"))
+            }
+            else -> {
+                // Light theme - use dark text
+                holder.accountName.setTextColor(android.graphics.Color.BLACK)
+                holder.accountMobile.setTextColor(android.graphics.Color.parseColor("#666666"))
+            }
+        }
+        
+        // Show active indicator for current account
+        holder.activeIndicator.visibility = if (account.id == activeAccountId) {
+            View.VISIBLE
+        } else {
+            View.GONE
+        }
+        
+        holder.itemView.setOnClickListener {
+            onAccountClick(account)
+        }
+    }
+
+    override fun getItemCount(): Int = accounts.size
+
+    fun updateAccounts(newAccounts: List<Account>, newActiveAccountId: String?) {
+        accounts = newAccounts
+        activeAccountId = newActiveAccountId
+        notifyDataSetChanged()
+    }
+}
diff --git a/app/src/main/java/sh/sar/gridflow/utils/SecureStorage.kt b/app/src/main/java/sh/sar/gridflow/utils/SecureStorage.kt
index c680bf4..6211ab1 100644
--- a/app/src/main/java/sh/sar/gridflow/utils/SecureStorage.kt
+++ b/app/src/main/java/sh/sar/gridflow/utils/SecureStorage.kt
@@ -5,14 +5,32 @@ import android.content.SharedPreferences
 import android.util.Log
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKey
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+
+data class Account(
+    val id: String, // mobile number as unique ID
+    val name: String,
+    val mobile: String,
+    val email: String,
+    val password: String,
+    val cookie: String?,
+    val userId: Int,
+    val isActive: Boolean = false
+)
 
 class SecureStorage(context: Context) {
     
     private val sharedPreferences: SharedPreferences
+    private val gson = Gson()
     
     companion object {
         private const val TAG = "SecureStorage"
         private const val PREFS_NAME = "gridflow_secure_prefs"
+        private const val KEY_ACCOUNTS = "accounts"
+        private const val KEY_ACTIVE_ACCOUNT_ID = "active_account_id"
+        
+        // Legacy keys for backward compatibility
         private const val KEY_MOBILE = "mobile"
         private const val KEY_PASSWORD = "password"
         private const val KEY_COOKIE = "cookie"
@@ -36,49 +54,157 @@ class SecureStorage(context: Context) {
                 EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
             )
             Log.d(TAG, "SecureStorage initialized successfully")
+            
+            // Migrate legacy data if exists
+            migrateLegacyData()
         } catch (e: Exception) {
             Log.e(TAG, "Failed to initialize SecureStorage", e)
             throw e
         }
     }
     
-    fun saveCredentials(mobile: String, password: String) {
-        Log.d(TAG, "Saving credentials for mobile: $mobile")
+    private fun migrateLegacyData() {
+        val legacyMobile = sharedPreferences.getString(KEY_MOBILE, null)
+        if (legacyMobile != null && getAllAccounts().isEmpty()) {
+            Log.d(TAG, "Migrating legacy account data")
+            val legacyAccount = Account(
+                id = legacyMobile,
+                name = sharedPreferences.getString(KEY_USER_NAME, "") ?: "",
+                mobile = legacyMobile,
+                email = sharedPreferences.getString(KEY_USER_EMAIL, "") ?: "",
+                password = sharedPreferences.getString(KEY_PASSWORD, "") ?: "",
+                cookie = sharedPreferences.getString(KEY_COOKIE, null),
+                userId = sharedPreferences.getInt(KEY_USER_ID, -1),
+                isActive = true
+            )
+            saveAccount(legacyAccount)
+            setActiveAccount(legacyMobile)
+            
+            // Clear legacy keys
+            sharedPreferences.edit()
+                .remove(KEY_MOBILE)
+                .remove(KEY_PASSWORD)
+                .remove(KEY_COOKIE)
+                .remove(KEY_USER_NAME)
+                .remove(KEY_USER_EMAIL)
+                .remove(KEY_USER_ID)
+                .apply()
+        }
+    }
+    
+    fun saveAccount(account: Account) {
+        Log.d(TAG, "Saving account: ${account.mobile}")
+        val accounts = getAllAccounts().toMutableList()
+        
+        // Remove existing account with same ID if exists
+        accounts.removeAll { it.id == account.id }
+        
+        // Add the new/updated account
+        accounts.add(account)
+        
+        // Save accounts list
+        val accountsJson = gson.toJson(accounts)
         sharedPreferences.edit()
-            .putString(KEY_MOBILE, mobile)
-            .putString(KEY_PASSWORD, password)
+            .putString(KEY_ACCOUNTS, accountsJson)
             .apply()
     }
     
+    fun getAllAccounts(): List<Account> {
+        val accountsJson = sharedPreferences.getString(KEY_ACCOUNTS, null)
+        return if (accountsJson != null) {
+            try {
+                val type = object : TypeToken<List<Account>>() {}.type
+                gson.fromJson(accountsJson, type)
+            } catch (e: Exception) {
+                Log.e(TAG, "Failed to parse accounts JSON", e)
+                emptyList()
+            }
+        } else {
+            emptyList()
+        }
+    }
+    
+    fun getActiveAccount(): Account? {
+        val activeAccountId = sharedPreferences.getString(KEY_ACTIVE_ACCOUNT_ID, null)
+        return if (activeAccountId != null) {
+            getAllAccounts().find { it.id == activeAccountId }
+        } else {
+            // Fallback to first account if no active account set
+            getAllAccounts().firstOrNull()
+        }
+    }
+    
+    fun setActiveAccount(accountId: String) {
+        Log.d(TAG, "Setting active account: $accountId")
+        sharedPreferences.edit()
+            .putString(KEY_ACTIVE_ACCOUNT_ID, accountId)
+            .apply()
+    }
+    
+    fun removeAccount(accountId: String) {
+        Log.d(TAG, "Removing account: $accountId")
+        val accounts = getAllAccounts().toMutableList()
+        accounts.removeAll { it.id == accountId }
+        
+        val accountsJson = gson.toJson(accounts)
+        sharedPreferences.edit()
+            .putString(KEY_ACCOUNTS, accountsJson)
+            .apply()
+            
+        // If this was the active account, set another one as active
+        val currentActiveId = sharedPreferences.getString(KEY_ACTIVE_ACCOUNT_ID, null)
+        if (currentActiveId == accountId) {
+            val remainingAccounts = getAllAccounts()
+            if (remainingAccounts.isNotEmpty()) {
+                setActiveAccount(remainingAccounts.first().id)
+            } else {
+                sharedPreferences.edit().remove(KEY_ACTIVE_ACCOUNT_ID).apply()
+            }
+        }
+    }
+    
+    // Legacy compatibility methods - these now work with the active account
+    fun saveCredentials(mobile: String, password: String) {
+        val activeAccount = getActiveAccount()
+        if (activeAccount != null) {
+            val updatedAccount = activeAccount.copy(mobile = mobile, password = password)
+            saveAccount(updatedAccount)
+        }
+    }
+    
     fun saveCookie(cookie: String) {
-        Log.d(TAG, "Saving cookie: $cookie")
-        sharedPreferences.edit()
-            .putString(KEY_COOKIE, cookie)
-            .apply()
+        val activeAccount = getActiveAccount()
+        if (activeAccount != null) {
+            val updatedAccount = activeAccount.copy(cookie = cookie)
+            saveAccount(updatedAccount)
+        }
     }
     
     fun saveUserInfo(name: String, email: String, userId: Int) {
-        Log.d(TAG, "Saving user info: name=$name, email=$email, userId=$userId")
-        sharedPreferences.edit()
-            .putString(KEY_USER_NAME, name)
-            .putString(KEY_USER_EMAIL, email)
-            .putInt(KEY_USER_ID, userId)
-            .apply()
+        val activeAccount = getActiveAccount()
+        if (activeAccount != null) {
+            val updatedAccount = activeAccount.copy(name = name, email = email, userId = userId)
+            saveAccount(updatedAccount)
+        }
     }
     
-    fun getMobile(): String? = sharedPreferences.getString(KEY_MOBILE, null)
-    fun getPassword(): String? = sharedPreferences.getString(KEY_PASSWORD, null)
-    fun getCookie(): String? = sharedPreferences.getString(KEY_COOKIE, null)
-    fun getUserName(): String? = sharedPreferences.getString(KEY_USER_NAME, null)
-    fun getUserEmail(): String? = sharedPreferences.getString(KEY_USER_EMAIL, null)
-    fun getUserId(): Int = sharedPreferences.getInt(KEY_USER_ID, -1)
+    fun getMobile(): String? = getActiveAccount()?.mobile
+    fun getPassword(): String? = getActiveAccount()?.password
+    fun getCookie(): String? = getActiveAccount()?.cookie
+    fun getUserName(): String? = getActiveAccount()?.name
+    fun getUserEmail(): String? = getActiveAccount()?.email
+    fun getUserId(): Int = getActiveAccount()?.userId ?: -1
     
     fun isLoggedIn(): Boolean {
-        return getCookie() != null && getUserName() != null
+        return getActiveAccount()?.cookie != null && getActiveAccount()?.name?.isNotEmpty() == true
     }
     
     fun clearCredentials() {
         Log.d(TAG, "Clearing all credentials")
         sharedPreferences.edit().clear().apply()
     }
+    
+    fun hasMultipleAccounts(): Boolean {
+        return getAllAccounts().size > 1
+    }
 }
diff --git a/app/src/main/res/color/account_dropdown_background.xml b/app/src/main/res/color/account_dropdown_background.xml
new file mode 100644
index 0000000..7d75e13
--- /dev/null
+++ b/app/src/main/res/color/account_dropdown_background.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Safe system background color -->
+    <item android:color="@android:color/background_light"/>
+</selector>
diff --git a/app/src/main/res/color/account_dropdown_text.xml b/app/src/main/res/color/account_dropdown_text.xml
new file mode 100644
index 0000000..df0cd70
--- /dev/null
+++ b/app/src/main/res/color/account_dropdown_text.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Safe system text color -->
+    <item android:color="@android:color/primary_text_light"/>
+</selector>
diff --git a/app/src/main/res/color/account_dropdown_text_secondary.xml b/app/src/main/res/color/account_dropdown_text_secondary.xml
new file mode 100644
index 0000000..e098382
--- /dev/null
+++ b/app/src/main/res/color/account_dropdown_text_secondary.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Safe secondary text color -->
+    <item android:color="@android:color/secondary_text_light"/>
+</selector>
diff --git a/app/src/main/res/color/account_list_background.xml b/app/src/main/res/color/account_list_background.xml
new file mode 100644
index 0000000..3227908
--- /dev/null
+++ b/app/src/main/res/color/account_list_background.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@android:color/background_light" />
+</selector>
diff --git a/app/src/main/res/color/account_list_text_color.xml b/app/src/main/res/color/account_list_text_color.xml
new file mode 100644
index 0000000..32da1f8
--- /dev/null
+++ b/app/src/main/res/color/account_list_text_color.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@android:color/primary_text_light" />
+</selector>
diff --git a/app/src/main/res/color/nav_header_arrow_tint.xml b/app/src/main/res/color/nav_header_arrow_tint.xml
new file mode 100644
index 0000000..a9eea66
--- /dev/null
+++ b/app/src/main/res/color/nav_header_arrow_tint.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Dark theme -->
+    <item android:color="#FFFFFF" android:state_selected="false"/>
+    <!-- Light theme fallback -->
+    <item android:color="#FFFFFF"/>
+</selector>
diff --git a/app/src/main/res/color/nav_header_text_color.xml b/app/src/main/res/color/nav_header_text_color.xml
new file mode 100644
index 0000000..282713b
--- /dev/null
+++ b/app/src/main/res/color/nav_header_text_color.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@android:color/white" />
+</selector>
diff --git a/app/src/main/res/drawable/account_circle_background.xml b/app/src/main/res/drawable/account_circle_background.xml
new file mode 100644
index 0000000..b489954
--- /dev/null
+++ b/app/src/main/res/drawable/account_circle_background.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="?attr/colorPrimary" />
+</shape>
diff --git a/app/src/main/res/drawable/ic_check_24.xml b/app/src/main/res/drawable/ic_check_24.xml
new file mode 100644
index 0000000..0346c59
--- /dev/null
+++ b/app/src/main/res/drawable/ic_check_24.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorOnSurface">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M9,16.17L4.83,12l-1.42,1.41L9,19 21,7l-1.41,-1.41z"/>
+</vector>
diff --git a/app/src/main/res/drawable/ic_expand_more_24.xml b/app/src/main/res/drawable/ic_expand_more_24.xml
new file mode 100644
index 0000000..e27707e
--- /dev/null
+++ b/app/src/main/res/drawable/ic_expand_more_24.xml
@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorOnSurface">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M16.59,8.59L12,13.17 7.41,8.59 6,10l6,6 6,-6z"/>
+</vector>
diff --git a/app/src/main/res/layout/activity_add_account.xml b/app/src/main/res/layout/activity_add_account.xml
new file mode 100644
index 0000000..6e9cc48
--- /dev/null
+++ b/app/src/main/res/layout/activity_add_account.xml
@@ -0,0 +1,167 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="?android:attr/colorBackground">
+
+    <!-- Toolbar -->
+    <androidx.appcompat.widget.Toolbar
+        android:id="@+id/toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="?attr/colorPrimary"
+        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
+        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+
+    <!-- Content ScrollView -->
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="32dp"
+            android:gravity="center">
+
+            <!-- App Logo Section -->
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:orientation="vertical"
+                android:gravity="center">
+
+                <ImageView
+                    android:id="@+id/iv_app_logo"
+                    android:layout_width="100dp"
+                    android:layout_height="100dp"
+                    android:layout_marginBottom="24dp"
+                    android:src="@mipmap/ic_launcher"
+                    android:contentDescription="GridFlow Logo" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Add Account"
+                    android:textSize="24sp"
+                    android:textStyle="bold"
+                    android:textColor="?android:attr/textColorPrimary"
+                    android:layout_marginBottom="8dp" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Sign in with another Fenaka account"
+                    android:textSize="14sp"
+                    android:textColor="?android:attr/textColorSecondary"
+                    android:alpha="0.7" />
+
+            </LinearLayout>
+
+            <!-- Login Form Section -->
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:layout_marginTop="32dp">
+
+                <!-- Mobile Number Input -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="16dp"
+                    android:hint="Mobile Number"
+                    app:boxStrokeColor="@color/design_default_color_primary"
+                    app:hintTextColor="@color/design_default_color_primary"
+                    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/et_mobile_number"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="phone"
+                        android:maxLength="7"
+                        android:textSize="16sp" />
+
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Password Input -->
+                <com.google.android.material.textfield.TextInputLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginBottom="24dp"
+                    android:hint="Password"
+                    app:boxStrokeColor="@color/design_default_color_primary"
+                    app:hintTextColor="@color/design_default_color_primary"
+                    app:passwordToggleEnabled="true"
+                    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox">
+
+                    <com.google.android.material.textfield.TextInputEditText
+                        android:id="@+id/et_password"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:inputType="textPassword"
+                        android:textSize="16sp" />
+
+                </com.google.android.material.textfield.TextInputLayout>
+
+                <!-- Action Buttons Row -->
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal"
+                    android:layout_marginBottom="32dp"
+                    android:weightSum="3">
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/btn_sign_in"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:layout_marginEnd="4dp"
+                        android:text="Sign In"
+                        android:textSize="12sp"
+                        app:cornerRadius="8dp" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/btn_register"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:layout_marginStart="4dp"
+                        android:layout_marginEnd="4dp"
+                        android:text="Register"
+                        android:textSize="12sp"
+                        style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                        app:cornerRadius="8dp" />
+
+                    <com.google.android.material.button.MaterialButton
+                        android:id="@+id/btn_forgot_password"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="1"
+                        android:layout_marginStart="4dp"
+                        android:text="Forgot?"
+                        android:textSize="12sp"
+                        style="@style/Widget.MaterialComponents.Button.TextButton"
+                        app:cornerRadius="8dp" />
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+            <!-- Spacer for bottom -->
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="32dp" />
+
+        </LinearLayout>
+
+    </ScrollView>
+
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index 1eb85e3..6995e26 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -4,7 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fillViewport="true"
-    android:background="?android:attr/colorBackground">
+    android:background="@android:color/white">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -35,7 +35,7 @@
                 android:text="GridFlow"
                 android:textSize="28sp"
                 android:textStyle="bold"
-                android:textColor="?android:attr/textColorPrimary"
+                android:textColor="#000000"
                 android:layout_marginBottom="8dp" />
 
             <TextView
@@ -43,7 +43,7 @@
                 android:layout_height="wrap_content"
                 android:text="Your Personal Fenaka Client"
                 android:textSize="14sp"
-                android:textColor="?android:attr/textColorSecondary"
+                android:textColor="#666666"
                 android:alpha="0.7" />
 
         </LinearLayout>
@@ -150,7 +150,7 @@
                     android:layout_width="0dp"
                     android:layout_height="1dp"
                     android:layout_weight="1"
-                    android:background="?android:attr/textColorSecondary"
+                    android:background="#CCCCCC"
                     android:alpha="0.3" />
 
                 <TextView
@@ -158,7 +158,7 @@
                     android:layout_height="wrap_content"
                     android:text="OR"
                     android:textSize="14sp"
-                    android:textColor="?android:attr/textColorSecondary"
+                    android:textColor="#666666"
                     android:alpha="0.7"
                     android:layout_marginStart="16dp"
                     android:layout_marginEnd="16dp" />
@@ -167,7 +167,7 @@
                     android:layout_width="0dp"
                     android:layout_height="1dp"
                     android:layout_weight="1"
-                    android:background="?android:attr/textColorSecondary"
+                    android:background="#CCCCCC"
                     android:alpha="0.3" />
 
             </LinearLayout>
diff --git a/app/src/main/res/layout/item_account.xml b/app/src/main/res/layout/item_account.xml
new file mode 100644
index 0000000..16aecef
--- /dev/null
+++ b/app/src/main/res/layout/item_account.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="?attr/selectableItemBackground"
+    android:gravity="center_vertical"
+    android:orientation="horizontal"
+    android:paddingLeft="16dp"
+    android:paddingTop="12dp"
+    android:paddingRight="16dp"
+    android:paddingBottom="12dp">
+
+    <!-- Account info -->
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/account_name"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Shihaam Abdul Rahman"
+            android:textColor="@android:color/black"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/account_mobile"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="9198026"
+            android:textColor="#666666"
+            android:textSize="12sp" />
+
+    </LinearLayout>
+
+    <!-- Active indicator -->
+    <ImageView
+        android:id="@+id/active_indicator"
+        android:layout_width="20dp"
+        android:layout_height="20dp"
+        android:src="@drawable/ic_check_24"
+        android:tint="?attr/colorPrimary"
+        android:visibility="gone" />
+
+</LinearLayout>
diff --git a/app/src/main/res/layout/nav_header_main.xml b/app/src/main/res/layout/nav_header_main.xml
index 43cdb2d..b1ddaa7 100644
--- a/app/src/main/res/layout/nav_header_main.xml
+++ b/app/src/main/res/layout/nav_header_main.xml
@@ -2,42 +2,134 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
-    android:layout_height="@dimen/nav_header_height"
+    android:layout_height="wrap_content"
     android:background="@drawable/side_nav_bar"
-    android:gravity="bottom"
     android:orientation="vertical"
-    android:paddingLeft="@dimen/activity_horizontal_margin"
-    android:paddingTop="@dimen/activity_vertical_margin"
-    android:paddingRight="@dimen/activity_horizontal_margin"
-    android:paddingBottom="@dimen/activity_vertical_margin"
     android:theme="@style/ThemeOverlay.AppCompat.Dark">
 
-    <ImageView
-        android:id="@+id/imageView"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:contentDescription="@string/nav_header_desc"
-        android:paddingTop="@dimen/nav_header_vertical_spacing"
-        app:srcCompat="@mipmap/ic_launcher_round" />
+    <!-- Main Account Section -->
+    <LinearLayout
+        android:id="@+id/main_account_section"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/nav_header_height"
+        android:gravity="bottom"
+        android:orientation="vertical"
+        android:paddingLeft="@dimen/activity_horizontal_margin"
+        android:paddingTop="@dimen/activity_vertical_margin"
+        android:paddingRight="@dimen/activity_vertical_margin"
+        android:paddingBottom="@dimen/activity_vertical_margin">
 
-    <TextView
-        android:id="@+id/nav_header_name"
+        <!-- Top section with app logo and account switcher -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:gravity="center_vertical"
+            android:orientation="horizontal">
+
+            <View
+                android:layout_width="0dp"
+                android:layout_height="1dp"
+                android:layout_weight="1" />
+
+            <ImageView
+                android:id="@+id/account_switcher_arrow"
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:background="?attr/selectableItemBackgroundBorderless"
+                android:contentDescription="Account switcher"
+                android:padding="4dp"
+                android:src="@drawable/ic_expand_more_24"
+                android:tint="@color/nav_header_text_color" />
+
+        </LinearLayout>
+
+        <!-- Account info section -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/nav_header_name"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Shihaam Abdul Rahman"
+                android:textAppearance="@style/TextAppearance.AppCompat.Body1"
+                android:textStyle="bold" />
+
+            <TextView
+                android:id="@+id/nav_header_mobile"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="2dp"
+                android:text="9198026"
+                android:textSize="12sp"
+                android:alpha="0.8" />
+
+            <TextView
+                android:id="@+id/nav_header_email"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="shihaam_ab_r@outlook.com"
+                android:textSize="11sp"
+                android:alpha="0.7" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+    <!-- Account List Section (initially hidden) -->
+    <LinearLayout
+        android:id="@+id/account_list_section"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:paddingTop="@dimen/nav_header_vertical_spacing"
-        android:text="Shihaam Abdul Rahman"
-        android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
+        android:orientation="vertical"
+        android:visibility="gone"
+        android:background="@android:color/white">
 
-    <TextView
-        android:id="@+id/nav_header_mobile"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="9198026" />
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/accounts_recycler_view"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingTop="8dp"
+            android:paddingBottom="8dp" />
 
-    <TextView
-        android:id="@+id/nav_header_email"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="shihaam_ab_r@outlook.com" />
+        <!-- Add Account Button -->
+        <LinearLayout
+            android:id="@+id/add_account_button"
+            android:layout_width="match_parent"
+            android:layout_height="48dp"
+            android:background="?attr/selectableItemBackground"
+            android:gravity="center_vertical"
+            android:orientation="horizontal"
+            android:paddingLeft="16dp"
+            android:paddingRight="16dp">
+
+            <ImageView
+                android:layout_width="24dp"
+                android:layout_height="24dp"
+                android:layout_marginRight="16dp"
+                android:src="@drawable/ic_add_24"
+                android:tint="?attr/colorPrimary" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Add account"
+                android:textColor="?attr/colorPrimary"
+                android:textSize="14sp" />
+
+        </LinearLayout>
+
+        <!-- Divider -->
+        <View
+            android:id="@+id/account_list_divider"
+            android:layout_width="match_parent"
+            android:layout_height="1dp"
+            android:layout_marginTop="8dp"
+            android:background="#E0E0E0" />
+
+    </LinearLayout>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/menu/activity_main_drawer.xml b/app/src/main/res/menu/activity_main_drawer.xml
index 9e77f69..6627d1b 100644
--- a/app/src/main/res/menu/activity_main_drawer.xml
+++ b/app/src/main/res/menu/activity_main_drawer.xml
@@ -8,18 +8,21 @@
             android:id="@+id/nav_dashboard"
             android:icon="@drawable/ic_dashboard_24"
             android:title="@string/menu_dashboard" />
+        <item
+            android:id="@+id/nav_bill_history"
+            android:icon="@drawable/ic_bill_history_24"
+            android:title="@string/menu_bill_history" />
         <item
             android:id="@+id/nav_subscriptions"
             android:icon="@drawable/ic_subscriptions_24"
             android:title="@string/menu_subscriptions" />
+    </group>
+
+    <group android:id="@+id/group_utilities">
         <item
             android:id="@+id/nav_band_rates"
             android:icon="@drawable/ic_band_rates_24"
             android:title="@string/menu_band_rates" />
-        <item
-            android:id="@+id/nav_bill_history"
-            android:icon="@drawable/ic_bill_history_24"
-            android:title="@string/menu_bill_history" />
         <item
             android:id="@+id/nav_pay_any_bill"
             android:icon="@drawable/ic_pay_any_bill_24"