Android MVC using kotlin.
It is a simple application where you can find four options. First a Google browser that uses a web view, second is a weather app, another is a camera, and the last is a drum app. Firebase authentication to allow user registration and login.
Firebase documentation:
Android https://firebase.google.com/docs/android/setup?authuser=0
Authentication https://firebase.google.com/docs/auth/android/start?authuser=0
Database https://firebase.google.com/docs/database?authuser=0
APK download https://drive.google.com/file/d/100U8Oi9NrFu4HVvLfeZUZCtYWU1LKx-m/view?usp=sharing