While there is no native app, you can legally play the actual PC game on your Android device using :
: Detailed truck interiors and realistic weather conditions. Euro Truck Driver Plus
: You can stream the PC version of ETS2 from Nvidia's cloud servers directly to your Android phone. This requires you to own the game on Steam.
There is no official APK or OBB file for Android , as the developer, SCS Software , has not released a native mobile version of the game.
