Flutter package that easily implement Light, Dark and System theme mode in your application and persists the theme mode on restart of the application.

πŸš€ Demo: Appearance

πŸ“± Screenshots

Appearance Demo 1 Appearance Demo 2

πŸ›  Installation

  1. Add dependency to pubspec.yaml file:
    Get the latest version from the 'Installing' tab on
  appearance: ^latest_version
  1. Import the package
import 'package:appearance/appearance.dart';

πŸ“˜ How to use

  1. Initialize SharedPreferencesManager singleton for SharedPreference and add it before runApp() method.
void main() async {
  await SharedPreferencesManager.instance.init();
  runApp(const MyApp());
  1. extend your root class with AppearanceState using keyword with.
class _MyAppState extends State<MyApp> with AppearanceState { }
  1. Wrap your MaterialApp or CupertinoApp with BuildWithAppearance
    initial: ThemeMode.light, // optional : default value is [ThemeMode.system]
    builder: (context) => MaterialApp()

Using MaterialApp

    initial: ThemeMode.light, // optional : default value is [ThemeMode.system]
    builder: (context) => MaterialApp(
        title: 'Appearance (Material Example)',
        themeMode: Appearance.of(context)?.mode,
        theme: ThemeData(
            brightness: Brightness.light,
        darkTheme: ThemeData(
            brightness: Brightness.dark,
        home: const HomeMaterialPage(),

Using CupertinoApp

    initial: ThemeMode.light, // optional : default value is [ThemeMode.system]
    builder: (context) {
        return CupertinoApp(
            title: 'Appearance (Cupertino Example)',
            theme: CupertinoThemeData(
                brightness: Appearance.of(context)?.cupertinoBrightness!,
            localizationsDelegates: const [
            home: HomeCupertinoPage(),

🌟 Features

  • Light, Dark and System mode options to change theme of app.

  • Theme persistance: Saved theme is persisted using SharedPreferences on restart.

  • Auto Listen Theme Mode changes, without adding extra listener.

  • Material and Cupertino, both apps are supported.

🧰 Parameters

  • initial: optional
    Set the initial ThemeMode of the app, by default its value is ThemeMode.system

Change Theme Mode

You can use the setMode method to change the theme mode of the app.

 // sets theme mode to System

 // sets theme mode to Light

 // sets theme mode to Dark

Get Theme Mode

 // get active theme mode

Get Cupertino Theme brightness

 // get active cupertino theme brightness

πŸ’» Example

Check out the example app in the example directory for both Material and Cupertino.


Feel free to contribute to this project.

  • If you found a bug or have a feature request, open an issue.

  • If you want to contribute, submit a pull request.

πŸ’³ License

This project is LICENSED under the MIT License. Use it freely, but let's play nice and give credit where it's due!

πŸŽ‰ Conclusion

I will be happy to answer any questions that you may have on this approach,
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