I recommend option 2
1. Download the APK (Wartribe_Academy_2.0.3_Estrada_android.apk)
2. Install the APK and run it once
3. Download the RPA File (archive2.0.2.rpa)
4. Move the RPA file to the game directory on your phone: Doccuments/Renpy_Saves/rooster.wartribe.academy/game
(The File Must be named: archive2.0.2.rpa
5. Restart the game!