Every round the AI does the exact same moves. The app also appears twice in the launcher, (once as tictactoe and the other as "start activity"). 2 player mode would be a good addition. And having a delay between the AI's final move, and the end game message would be great, as currently it appears instantly on the final move, often meaning you never get to see the final move.
The bot does always the same for me and the difficulty is never getting harder.
AI needs some work. And multiplayer would be nice.
The app has the same moves. I've been beating it every single time. It doesn't learn from its mistake.