Use APKPure App
Get Planes Onslaught 2 old version APK for Android
Pick a plane, customize it, blow other planes up
Pick one of four planes, each with its own stats, and modify according to what suits your play style most.
Pack your plane with all kind of weapons (and maybe some extra fuel or ammo) and compete with other players for #1 over 4 leader boards; one per plane type.