Use APKPure App
Get Hannover Christmas old version APK for Android
هانوفر عيد الميلاد
This App I have create after visiting my friend Robert on Christmas in Hannover.
He is good guitar player and singer, so I have record his playing with just an simple audio recorder from the Android smartphone, without any additional processing.
This app uses in the core the Firebase and open source ExoPlayer from Google:
https://firebase.google.com/
https://github.com/google/ExoPlayer