xo toggle: block flip

XO Toggle is a minimalist logic puzzle built on one simple twist: every block you place flips the cells it covers between X and O.

■ How to play
• Drop blocks onto the grid — covered cells flip between X and O.
• Use every block so the grid matches the target shape shown above.
• Order and position both matter. Plan each move carefully.

■ Features
• Hundreds of puzzles, procedurally generated per level — always fresh
• Smooth difficulty ramp: more blocks and rotations as you progress
• Stuck? Use a hint to reveal one piece of the solution
• Auto-save — close the app and pick up exactly where you left off
• Korean and English supported
• Portrait, one-hand friendly
• Works offline

■ Great for
• A quick mental reset on the train or between meetings
• Players who prefer spatial puzzles over word or number games
• Anyone who likes a clean interface with no fluff

Simple rules. Deep thinking. Give your brain a tidy little workout with XO Toggle.