The pencil-and-paper classic now fits on one screen, with no eraser needed for a rematch. Put the phone between you, take one square per turn and build a line of three before the other player does.
Frequently asked questions
Do we have to hand the phone over every turn?
Not necessarily. The whole board is shared and contains no secret information, so you can leave the device between both players and tap a square in turn.
How do we start a rematch?
After a win or draw, use Play again to clear the board immediately and begin a new round.