A free app for Android, by M. Brodski Software.

Do you remember the old-school game of Tic Tac Toe? Even if played only on any available sheet of paper, it had already provided enough mental stimulation to help young people cope with perhaps an hour of boredom.

Developed by M. Brodski Software, Tic-tac-toe 3-4-5 brings to your mobile device this classic boredom killer – with extra features. The 3-4-5 in the game name refers to the available modes or boards or tables: a 3×3, a 4×4, and a 5×5 mode – which points to the number of squares in the playing field.

You don’t need another living human being to play this game – because you (X) can enjoy a game by playing against the AI (O).