flet-dev · mccre110 · Aug 6, 2026 · Aug 6, 2026 · Aug 6, 2026 · Aug 6, 2026
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -716,6 +716,7 @@ jobs:
             flet-flashlight
             flet-geolocator
             flet-lottie
+            flet-local-auth
             flet-map
             flet-permission-handler
             flet-rive
@@ -995,6 +996,7 @@ jobs:
             flet_flashlight \
             flet_geolocator \
             flet_lottie \
+            flet_local_auth \
             flet_map \
             flet_permission_handler \
             flet_rive \

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,13 @@
+## Unreleased
+
+### New features
+
+* Add `flet-local-auth` extension with a `LocalAuthentication` service for on-device biometric and credential authentication on Android, iOS, macOS, and Windows via the [`local_auth`](https://pub.dev/packages/local_auth) Flutter plugin. Linux and Web are not supported.
+
+### Improvements
+
+* Android host apps now use `FlutterFragmentActivity` and an AppCompat `LaunchTheme` so biometric authentication dialogs work on API 24–27. A `biometric` cross-platform permission bundle adds `NSFaceIDUsageDescription` for iOS and macOS builds.
+
 ## 0.86.3
 
 ### Bug fixes

diff --git a/client/android/app/src/main/kotlin/com/appveyor/flet_client/MainActivity.kt b/client/android/app/src/main/kotlin/com/appveyor/flet_client/MainActivity.kt
@@ -1,5 +1,5 @@
 package com.appveyor.flet_client
 
-import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.android.FlutterFragmentActivity
 
-class MainActivity : FlutterActivity()
+class MainActivity : FlutterFragmentActivity()
diff --git a/client/android/app/src/main/res/values-night/styles.xml b/client/android/app/src/main/res/values-night/styles.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+    <style name="LaunchTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
         <!-- Show a splash screen on the activity. Automatically removed when
              the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>

diff --git a/client/android/app/src/main/res/values/styles.xml b/client/android/app/src/main/res/values/styles.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
-    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+    <style name="LaunchTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
         <!-- Show a splash screen on the activity. Automatically removed when
              the Flutter engine draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>

diff --git a/client/ios/Runner/Info.plist b/client/ios/Runner/Info.plist
@@ -37,6 +37,8 @@
 	</dict>
 	<key>NSCameraUsageDescription</key>
 	<string>This app uses the camera to capture photos and video.</string>
+	<key>NSFaceIDUsageDescription</key>
+	<string>This app uses biometrics to authenticate you.</string>
 	<key>NSLocationWhenInUseUsageDescription</key>
 	<string>This app needs access to location.</string>
 	<key>NSMicrophoneUsageDescription</key>

diff --git a/client/lib/main.dart b/client/lib/main.dart
@@ -14,6 +14,7 @@ import 'package:flet_datatable2/flet_datatable2.dart' as flet_datatable2;
 import "package:flet_flashlight/flet_flashlight.dart" as flet_flashlight;
 import 'package:flet_geolocator/flet_geolocator.dart' as flet_geolocator;
 import 'package:flet_lottie/flet_lottie.dart' as flet_lottie;
+import 'package:flet_local_auth/flet_local_auth.dart' as flet_local_auth;
 import 'package:flet_map/flet_map.dart' as flet_map;
 import 'package:flet_permission_handler/flet_permission_handler.dart'
     as flet_permission_handler;
@@ -57,6 +58,7 @@ void main([List<String>? args]) async {
     flet_flashlight.Extension(),
     flet_geolocator.Extension(),
     flet_lottie.Extension(),
+    flet_local_auth.Extension(),
     flet_map.Extension(),
     flet_permission_handler.Extension(),
     flet_secure_storage.Extension(),

diff --git a/client/macos/Flutter/GeneratedPluginRegistrant.swift b/client/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -12,6 +12,7 @@ import device_info_plus
 import file_picker
 import flutter_secure_storage_darwin
 import geolocator_apple
+import local_auth_darwin
 import media_kit_libs_macos_video
 import media_kit_video
 import package_info_plus
@@ -35,6 +36,7 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FilePickerPlugin.register(with: registry.registrar(forPlugin: "FilePickerPlugin"))
   FlutterSecureStorageDarwinPlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStorageDarwinPlugin"))
   GeolocatorPlugin.register(with: registry.registrar(forPlugin: "GeolocatorPlugin"))
+  LocalAuthPlugin.register(with: registry.registrar(forPlugin: "LocalAuthPlugin"))
   MediaKitLibsMacosVideoPlugin.register(with: registry.registrar(forPlugin: "MediaKitLibsMacosVideoPlugin"))
   MediaKitVideoPlugin.register(with: registry.registrar(forPlugin: "MediaKitVideoPlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))

diff --git a/client/pubspec.lock b/client/pubspec.lock
@@ -437,6 +437,13 @@ packages:
       relative: true
     source: path
     version: "0.86.0"
+  flet_local_auth:
+    dependency: "direct main"
+    description:
+      path: "../sdk/python/packages/flet-local-auth/src/flutter/flet_local_auth"
+      relative: true
+    source: path
+    version: "0.1.0"
   flet_lottie:
     dependency: "direct main"
     description:
@@ -897,6 +904,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.1"
+  local_auth:
+    dependency: transitive
+    description:
+      name: local_auth
+      sha256: ecf24edf2283c509ecd217e3595f6f71034b68888d28ad1dae6bfa0857b816ac
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  local_auth_android:
+    dependency: transitive
+    description:
+      name: local_auth_android
+      sha256: fdb936d59ab945c7af297defd67bd1ed87b11b6db1bc16d01e94677a8f1c38ec
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.9"
+  local_auth_darwin:
+    dependency: transitive
+    description:
+      name: local_auth_darwin
+      sha256: a8c3d4e17454111f7fd31ff72a31222359f6059f7fe956c2dcfe0f88f49826d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.3"
+  local_auth_platform_interface:
+    dependency: transitive
+    description:
+      name: local_auth_platform_interface
+      sha256: f98b8e388588583d3f781f6806e4f4c9f9e189d898d27f0c249b93a1973dd122
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  local_auth_windows:
+    dependency: transitive
+    description:
+      name: local_auth_windows
+      sha256: be12c5b8ba5e64896983123655c5f67d2484ecfcc95e367952ad6e3bff94cb16
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   logging:
     dependency: transitive
     description:

diff --git a/client/pubspec.yaml b/client/pubspec.yaml
@@ -73,6 +73,9 @@ dependencies:
   flet_lottie:
     path: ../sdk/python/packages/flet-lottie/src/flutter/flet_lottie
 
+  flet_local_auth:
+    path: ../sdk/python/packages/flet-local-auth/src/flutter/flet_local_auth
+
   flet_map:
     path: ../sdk/python/packages/flet-map/src/flutter/flet_map
 

diff --git a/client/windows/flutter/generated_plugin_registrant.cc b/client/windows/flutter/generated_plugin_registrant.cc
@@ -11,6 +11,7 @@
 #include <connectivity_plus/connectivity_plus_windows_plugin.h>
 #include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
 #include <geolocator_windows/geolocator_windows.h>
+#include <local_auth_windows/local_auth_plugin.h>
 #include <media_kit_libs_windows_video/media_kit_libs_windows_video_plugin_c_api.h>
 #include <media_kit_video/media_kit_video_plugin_c_api.h>
 #include <pasteboard/pasteboard_plugin.h>
@@ -34,6 +35,8 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("FlutterSecureStorageWindowsPlugin"));
   GeolocatorWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("GeolocatorWindows"));
+  LocalAuthPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("LocalAuthPlugin"));
   MediaKitLibsWindowsVideoPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("MediaKitLibsWindowsVideoPluginCApi"));
   MediaKitVideoPluginCApiRegisterWithRegistrar(

diff --git a/client/windows/flutter/generated_plugins.cmake b/client/windows/flutter/generated_plugins.cmake
@@ -8,6 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   connectivity_plus
   flutter_secure_storage_windows
   geolocator_windows
+  local_auth_windows
   media_kit_libs_windows_video
   media_kit_video
   pasteboard

diff --git a/sdk/python/examples/apps/flet_build_test/pyproject.toml b/sdk/python/examples/apps/flet_build_test/pyproject.toml
@@ -20,6 +20,7 @@ dependencies = [
     "flet-flashlight",
     "flet-geolocator",
     "flet-lottie",
+    "flet-local-auth",
     "flet-map",
     "flet-permission-handler",
     "flet-rive",
@@ -52,6 +53,7 @@ flet-datatable2 = { path = "../../../packages/flet-datatable2", editable = true
 flet-flashlight = { path = "../../../packages/flet-flashlight", editable = true }
 flet-geolocator = { path = "../../../packages/flet-geolocator", editable = true }
 flet-lottie = { path = "../../../packages/flet-lottie", editable = true }
+flet-local-auth = { path = "../../../packages/flet-local-auth", editable = true }
 flet-map = { path = "../../../packages/flet-map", editable = true }
 flet-permission-handler = { path = "../../../packages/flet-permission-handler", editable = true }
 flet-rive = { path = "../../../packages/flet-rive", editable = true }
@@ -73,6 +75,7 @@ flet-datatable2 = "../../../packages/flet-datatable2"
 flet-flashlight = "../../../packages/flet-flashlight"
 flet-geolocator = "../../../packages/flet-geolocator"
 flet-lottie = "../../../packages/flet-lottie"
+flet-local-auth = "../../../packages/flet-local-auth"
 flet-map = "../../../packages/flet-map"
 flet-permission-handler = "../../../packages/flet-permission-handler"
 flet-rive = "../../../packages/flet-rive"

diff --git a/sdk/python/examples/extensions/local_auth/local_auth/main.py b/sdk/python/examples/extensions/local_auth/local_auth/main.py
@@ -0,0 +1,52 @@
+import flet as ft
+import flet_local_auth as auth
+
+
+def main(page: ft.Page):
+    status = ft.Text(theme_style=ft.TextThemeStyle.TITLE_MEDIUM)
+    local_auth = auth.LocalAuthentication()
+
+    async def refresh_capabilities(_):
+        supported = await local_auth.is_device_supported()
+        can_check = await local_auth.can_check_biometrics()
+        biometrics = await local_auth.get_available_biometrics()
+        status.value = (
+            f"Device supported: {supported}\n"
+            f"Biometric hardware: {can_check}\n"
+            f"Enrolled biometrics: {', '.join(b.value for b in biometrics) or 'none'}"
+        )
+
+    async def authenticate(_):
+        try:
+            ok = await local_auth.authenticate(
+                "Authenticate to continue",
+                android_messages=auth.AndroidAuthMessages(
+                    sign_in_title="Unlock",
+                    cancel_button="Not now",
+                ),
+            )
+            status.value = f"Authenticated: {ok}"
+        except auth.LocalAuthException as e:
+            status.value = f"Authentication failed: {e.code.value}"
+
+    page.add(
+        ft.SafeArea(
+            content=ft.Column(
+                spacing=16,
+                controls=[
+                    ft.Container(
+                        bgcolor=ft.Colors.SURFACE_CONTAINER_HIGHEST,
+                        border_radius=12,
+                        padding=16,
+                        content=status,
+                    ),
+                    ft.Button("Check capabilities", on_click=refresh_capabilities),
+                    ft.Button("Authenticate", on_click=authenticate),
+                ],
+            ),
+        )
+    )
+
+
+if __name__ == "__main__":
+    ft.run(main)
diff --git a/sdk/python/examples/extensions/local_auth/local_auth/pyproject.toml b/sdk/python/examples/extensions/local_auth/local_auth/pyproject.toml
@@ -0,0 +1,27 @@
+[project]
+name = "local_auth"
+version = "1.0.0"
+description = "Prompts for on-device biometric or credential authentication."
+requires-python = ">=3.10"
+keywords = ["local auth", "biometric", "example", "services", "async"]
+authors = [{ name = "Flet team", email = "hello@flet.dev" }]
+dependencies = ["flet", "flet-local-auth"]
+
+[dependency-groups]
+dev = ["flet-cli", "flet-desktop", "flet-web"]
+
+[tool.flet.gallery]
+categories = ["Utility/LocalAuthentication"]
+
+[tool.flet.metadata]
+title = "Local authentication"
+controls = ["SafeArea", "Column", "Page", "LocalAuthentication", "Button", "Text"]
+layout_pattern = "inline-actions"
+complexity = "basic"
+features = ["biometric authentication", "device capability checks"]
+
+[tool.flet]
+org = "dev.flet"
+company = "Flet"
+copyright = "Copyright (C) 2023-2026 by Flet"
+platforms = ["ios", "android", "windows", "macos"]
diff --git a/sdk/python/packages/flet-cli/src/flet_cli/commands/build_base.py b/sdk/python/packages/flet-cli/src/flet_cli/commands/build_base.py
@@ -234,6 +234,17 @@ def __init__(self, parser: argparse.ArgumentParser) -> None:
                 },
                 "android_features": {},
             },
+            "biometric": {
+                "ios_info_plist": {
+                    "NSFaceIDUsageDescription": "This app uses biometrics to authenticate you."  # noqa: E501
+                },
+                "macos_info_plist": {
+                    "NSFaceIDUsageDescription": "This app uses biometrics to authenticate you."  # noqa: E501
+                },
+                "macos_entitlements": {},
+                "android_permissions": {},
+                "android_features": {},
+            },
         }
 
         # create and display build-platform-matrix table

diff --git a/sdk/python/packages/flet-local-auth/LICENSE b/sdk/python/packages/flet-local-auth/LICENSE
@@ -0,0 +1,3 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
diff --git a/sdk/python/packages/flet-local-auth/README.md b/sdk/python/packages/flet-local-auth/README.md
@@ -0,0 +1,3 @@
+# Flet Local Authentication
+
+`LocalAuthentication` service for Flet apps. Authenticate users with biometrics, PIN, passcode, or pattern via the [`local_auth`](https://pub.dev/packages/local_auth) Flutter plugin.
diff --git a/sdk/python/packages/flet-local-auth/pyproject.toml b/sdk/python/packages/flet-local-auth/pyproject.toml
@@ -0,0 +1,26 @@
+[project]
+name = "flet-local-auth"
+version = "0.1.0"
+description = "Local authentication service for Flet"
+authors = [{name = "Appveyor Systems Inc.", email = "hello@flet.dev"}]
+readme = "README.md"
+requires-python = ">=3.10"
+dependencies = [
+    "flet",
+]
+
+[project.urls]
+Homepage = "https://flet.dev"
+Documentation = "https://flet.dev/docs/services/localauthentication"
+Repository = "https://github.com/flet-dev/flet/tree/main/sdk/python/packages/flet-local-auth"
+Issues = "https://github.com/flet-dev/flet/issues"
+
+[tool.setuptools.package-data]
+"flutter.flet_local_auth" = [
+    "pubspec.yaml",
+    "lib/**",
+]
+
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
diff --git a/sdk/python/packages/flet-local-auth/src/flet_local_auth/__init__.py b/sdk/python/packages/flet-local-auth/src/flet_local_auth/__init__.py
@@ -0,0 +1,19 @@
+from flet_local_auth.local_auth import LocalAuthentication
+from flet_local_auth.types import (
+    AndroidAuthMessages,
+    BiometricType,
+    IOSAuthMessages,
+    LocalAuthErrorCode,
+    LocalAuthException,
+    WindowsAuthMessages,
+)
+
+__all__ = [
+    "AndroidAuthMessages",
+    "BiometricType",
+    "IOSAuthMessages",
+    "LocalAuthErrorCode",
+    "LocalAuthentication",
+    "LocalAuthException",
+    "WindowsAuthMessages",
+]
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		# Flet Local Authentication

		`LocalAuthentication` service for Flet apps. Authenticate users with biometrics, PIN, passcode, or pattern via the [`local_auth`](https://pub.dev/packages/local_auth) Flutter plugin.