Firebase Authentication App – Native Android Application

This is a fully-featured Firebase Authentication app built with Kotlin in Android Studio. It is designed for developers who want a ready-to-use authentication system in their Android projects, with clean architecture and maintainable code.

Main Features:

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• Authentication with Google, Twitter, GitHub, Anonymous, Phone, and Email/Password   
• MVVM architecture for a clear separation of UI and backend logic, making the app scalable and easier to debug   
• Phone number validation supporting international formats   
• CodePicker integration to select the country code for phone numbers   
• Firebase Realtime Database integration for user data management   
• Latest SDK (version 36) and up-to-date libraries   
• Clean, readable, and well-structured code for easy customization   
• Step-by-step setup documentation included with screenshots to configure authentication methods and Firebase database

Who Is This For?

This app is perfect for developers looking to quickly integrate a robust authentication system into their Android application. It is suitable for both beginners and experienced developers who need a reliable starting point for authentication workflows.

Support & Customization:

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• Full support available for buyers at any time   
• Custom modifications or additional features can be implemented upon request

Note: The app is written in Kotlin using the MVVM pattern, ensuring a maintainable, scalable, and high-performance solution for authentication needs. All code and features included are real, tested, and ready to be integrated into your project.

- Multiple Firebase authentication methods
- Realtime Database integration
- Modern UI with clean architecture (MVVM)
- International phone number validation
- Secure and scalable authentication flow
- Clean, well-documented Kotlin code
- Ready-to-use and easy to customize

- Android Studio
- Firebase account & configured project
- google-services.json file
- Enabled Firebase Authentication methods

1. Open the project in Android Studio.
2. Create a new Firebase project in the Firebase Console.
3. Enable the required Authentication methods (Google, Twitter, GitHub, Phone, Email/Password, Anonymous).
4. Add your Android app to Firebase and download the google-services.json file.
5. Place the google-services.json file inside the app module.
6. Add your SHA-1 and SHA-256 keys to Firebase (required for some providers).
7. Sync the project and run the application.

For detailed setup, please refer to the included documentation file with screenshots.