Can you tell what tools and features of Firebase you have used in your projects?

In Android projects, I used several key tools and features of Firebase:

• Firebase Authentication — for quick and secure user authentication via email, Google, Facebook, and other providers.
• Cloud Firestore — for storing and synchronizing data in real-time between clients.
• Firebase Realtime Database — for applications that require instant data synchronization.
• Firebase Cloud Messaging (FCM) — for sending push notifications to users.
• Firebase Crashlytics — for collecting and analyzing crashes and errors in the app.
• Firebase Analytics — for tracking user behavior and events within the app.

For example, with Firebase Authentication, you can quickly implement login via Google:

FirebaseAuth auth = FirebaseAuth.getInstance();
// after successful authentication via Google
FirebaseUser user = auth.getCurrentUser();

Firebase significantly simplifies the integration of backend services and accelerates mobile app development.