diff --git a/mobile/apps/auth/lib/ui/home_page.dart b/mobile/apps/auth/lib/ui/home_page.dart
index 3a3d650259..f836afb7db 100644
--- a/mobile/apps/auth/lib/ui/home_page.dart
+++ b/mobile/apps/auth/lib/ui/home_page.dart
@@ -321,7 +321,8 @@ class _HomePageState extends State<HomePage> {
     final bool shouldShowLockScreen =
         await LockScreenSettings.instance.shouldShowLockScreen();
     if (shouldShowLockScreen) {
-      await AppLock.of(context)!.showLockScreen();
+      // Manual lock: do not auto-prompt Touch ID; wait for user tap
+      await AppLock.of(context)!.showManualLockScreen();
     } else {
       await showDialogWidget(
         context: context,
diff --git a/mobile/apps/auth/lib/ui/tools/app_lock.dart b/mobile/apps/auth/lib/ui/tools/app_lock.dart
index 1428c553c6..25289e680d 100644
--- a/mobile/apps/auth/lib/ui/tools/app_lock.dart
+++ b/mobile/apps/auth/lib/ui/tools/app_lock.dart
@@ -127,14 +127,19 @@ class _AppLockState extends State<AppLock> with WidgetsBindingObserver {
           case '/lock-screen':
             return PageRouteBuilder(
               pageBuilder: (_, __, ___) => this._lockScreen,
+              settings: settings,
             );
           case '/unlocked':
             return PageRouteBuilder(
               pageBuilder: (_, __, ___) =>
                   this.widget.builder(settings.arguments),
+              settings: settings,
             );
         }
-        return PageRouteBuilder(pageBuilder: (_, __, ___) => this._lockScreen);
+        return PageRouteBuilder(
+          pageBuilder: (_, __, ___) => this._lockScreen,
+          settings: settings,
+        );
       },
     );
   }
@@ -190,10 +195,18 @@ class _AppLockState extends State<AppLock> with WidgetsBindingObserver {
     });
   }
 
-  /// Manually show the [lockScreen].
+  /// Show the [lockScreen] for automatic locking (app launch, background resume).
   Future<void> showLockScreen() {
     this._isLocked = true;
-    return _navigatorKey.currentState!.pushNamed('/lock-screen');
+    return _navigatorKey.currentState!
+        .pushNamed('/lock-screen', arguments: {"manual": false});
+  }
+
+  /// Show the [lockScreen] for user-initiated manual lock (no auto-auth on first frame).
+  Future<void> showManualLockScreen() {
+    this._isLocked = true;
+    return _navigatorKey.currentState!
+        .pushNamed('/lock-screen', arguments: {"manual": true});
   }
 
   void _didUnlockOnAppLaunch(Object? args) {
diff --git a/mobile/apps/auth/lib/ui/tools/lock_screen.dart b/mobile/apps/auth/lib/ui/tools/lock_screen.dart
index 71adcd3f28..bdc6336498 100644
--- a/mobile/apps/auth/lib/ui/tools/lock_screen.dart
+++ b/mobile/apps/auth/lib/ui/tools/lock_screen.dart
@@ -34,6 +34,9 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
   final _lockscreenSetting = LockScreenSettings.instance;
   late Brightness _platformBrightness;
   final bool isLoggedIn = Configuration.instance.isLoggedIn();
+  bool _isManualPresentation = false;
+  // Suppress auto-auth only for the initial manual presentation.
+  bool _suppressAutoPrompt = false;
 
   @override
   void initState() {
@@ -42,7 +45,16 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
     invalidAttemptCount = _lockscreenSetting.getInvalidAttemptCount();
     WidgetsBinding.instance.addObserver(this);
     WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
-      _showLockScreen(source: "postFrameInit");
+      final Object? args = ModalRoute.of(context)?.settings.arguments;
+      if (args is Map && args['manual'] is bool) {
+        _isManualPresentation = args['manual'] as bool;
+      } else {
+        _isManualPresentation = false;
+      }
+      _suppressAutoPrompt = _isManualPresentation;
+      if (!_isManualPresentation) {
+        _showLockScreen(source: "postFrameInit");
+      }
     });
     _platformBrightness =
         SchedulerBinding.instance.platformDispatcher.platformBrightness;
@@ -67,7 +79,8 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
       ),
       body: GestureDetector(
         onTap: () {
-          isTimerRunning ? null : _showLockScreen(source: "tap");
+          if (isTimerRunning) return;
+          _showLockScreen(source: "tap");
         },
         child: Container(
           decoration: BoxDecoration(
@@ -215,8 +228,7 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
           DateTime.now().millisecondsSinceEpoch - lastAuthenticatingTime! <
               5000;
       if (!_hasAuthenticationFailed && !didAuthInLast5Seconds) {
-        // Show the lock screen again only if the app is resuming from the
-        // background, and not when the lock screen was explicitly dismissed
+        // If there is a cooldown timer (after multiple failures), respect it
         if (_lockscreenSetting.getlastInvalidAttemptTime() >
                 DateTime.now().millisecondsSinceEpoch &&
             !_isShowingLockScreen) {
@@ -227,6 +239,9 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
             startLockTimer(time);
             _showLockScreen(source: "lifeCycle");
           });
+        } else if (!_suppressAutoPrompt) {
+          // No cooldown: auto-prompt when app becomes active again
+          _showLockScreen(source: "lifeCycle");
         }
       } else {
         _hasAuthenticationFailed = false; // Reset failure state
@@ -238,6 +253,9 @@ class _LockScreenState extends State<LockScreen> with WidgetsBindingObserver {
       if (!_isShowingLockScreen) {
         _hasPlacedAppInBackground = true;
         _hasAuthenticationFailed = false; // reset failure state
+        // If we suppressed the initial auto-prompt due to manual lock,
+        // enable auto-prompt for the next resume after focus loss.
+        _suppressAutoPrompt = false;
       }
     }
   }
diff --git a/mobile/apps/auth/lib/utils/auth_util.dart b/mobile/apps/auth/lib/utils/auth_util.dart
index 6c797a4328..9e363ee63c 100644
--- a/mobile/apps/auth/lib/utils/auth_util.dart
+++ b/mobile/apps/auth/lib/utils/auth_util.dart
@@ -30,7 +30,8 @@ Future<bool> requestAuthentication(
       isAuthenticatingForInAppChange: isAuthenticatingForInAppChange,
     );
   }
-  if (Platform.isMacOS || Platform.isLinux) {
+  if (Platform.isLinux) {
+    // Linux uses flutter_local_authentication
     return await FlutterLocalAuthentication().authenticate();
   } else {
     await LocalAuthentication().stopAuthentication();