The Minimax Tic-Tac-Toe algorithm is impossible to beat, and when two Minimaxes play against each other, every move they make is the best response to what the opponent could possibly do (Nash equilibrium), resulting in 100% chance of a draw.
Apple also follows a stringent review policy for all its App Store apps to ensure that only the best of the best are available to their users. Due to these reasons, APK files are not compatible with iOS.