Shikaku Dojo

Shikaku Dojo is a calm, offline logic puzzle. Divide the grid into rectangles. Each number is the area of the rectangle it belongs to: one number per rectangle, no overlaps, no gaps. Simple rules, deep thinking.

Climb the dojo. Progress through nine belts, from white to black, across boards that grow from gentle 5x5 grids to demanding 17x17 puzzles. Pass a belt exam to earn each promotion.

• 2,500+ unique puzzles, every one machine verified with a single solution • Nine belt journey with promotion ceremonies • Daily puzzle and streaks to keep your mind sharp • Free Play library: choose any size and difficulty • Time Dojo: an optional timed mode for a sharper challenge • A two tier hint system for when you are truly stuck • Board texture themes to make the dojo your own • Light and dark themes, smooth animation, and tactile feedback • Fully offline. No account, no sign up, play anywhere • VoiceOver support, plus Game Center leaderboards and achievements

Quiet, focused, and made to return to. Sharpen your logic, one belt at a time.