MVVM(Model view viewmodel architecture) - Software architectural pattern that facilitates the separation of the development of the graphical user interface (the view) – be it via a markup language or GUI code.

1. Real-Time Group Messaging (Discussion).
2. Blog Section.
3. Course Selection.
4. Classroom.

• Firebase: authentication | database | Real-time messaging | Storage.
• ViewModel: Stores UI-related data that isn't destroyed on app rotations
• LiveData: To build data objects that notify views when the underlying database changes.
• Data Binding with binding adapters
• Navigation with the SafeArgs plugin
• Multidex support: Below is Multidex Process illustration.
  • Dex stands for Dalvik Executable, which is what Google's virtual machine processor (Dalvik) uses to handle Android Applications. MultiDex integration in Android Studio allows Android Developers the ability to compile and execute a code-base with over 65,536 methods!.
    
• OkHttp interceptor It logs HTTP request and response data.
  

Google Play

Glide - Glide is a fast and efficient open source media management and image loading framework for Android that wraps media decoding, memory and disk caching.
YouTube Player - YouTube Player library for Android and Chromecast, stable and customizable. - PierfrancescoSoffritti/android-youtube-player.
Retrofit - A REST Client for Java and Android. It makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based webservice. In Retrofit you configure which converter is used for the data serialization.
Kotlin Coroutines - Coroutines are computer program components that generalize subroutines for non-preemptive multitasking, by allowing execution to be suspended and resumed. Coroutines are well-suited for implementing familiar program components such as cooperative tasks, exceptions, event loops, iterators, infinite lists and pipes.