If you decide to proceed with a modded version, the process generally follows these steps:
Using mods to bypass payments violates the terms of service. Always consider supporting developers by purchasing official releases when possible. How to Install (General Steps)
Go to your device Settings > Security and toggle on "Install from Unknown Sources."
Access all chapters, including the Garruk’s Revenge expansion.
Because the game was designed for older versions of Android, it may crash on modern devices (Android 12 or higher), even with a patch.