A minimalistic, strategy-first tic tac toe with three modes: Classic, Ultimate, and Infinite. Offline AI and local 2-player on one device.

Modes
- Classic: the standard 3×3 for fast, focused play.
- Ultimate: nine small 3×3 boards make one big board. The square you choose in a small board sends your opponent to the matching small board. Win small boards to claim spaces on the big board; three in a row on the big board wins.
- Infinite: classic 3×3 with aging marks. From your 4th move, your oldest mark disappears (5th removes your 2nd, and so on). Positions shift as marks cycle off. Includes an optional opening rule to avoid a known forced-win from side-cell starts; you can restrict the first move to corner or center in Settings.

Play options
- VS Computer: three difficulty levels tuned for each mode.
- Local Multiplayer: two players on one device.
- Controls: undo a move or reset the board instantly.
- Local-only: no online multiplayer.

Design
- Minimalistic, clean design that keeps the focus on your decisions.
- Smooth visuals and responsive controls.
- No accounts.

Master Classic fundamentals, think two boards ahead in Ultimate, and time your plays in Infinite’s evolving positions. Whether you call it tic tac toe, tic-tac-toe, or noughts and crosses, if you want clean, strategic, offline play, this is your board.