Shikaku, made calm
A quiet place to think.
Kaku is a polished Shikaku puzzle for iOS. Divide the grid into rectangles — one number each, equal to its area. A new puzzle every day, streaks, and nothing else shouting for your attention.
A puzzle every day
One shared Puzzle of the Day, the same for everyone. Keep your streak alive and compete on the daily leaderboard.
One simple rule
Divide the grid into rectangles. Each rectangle holds exactly one number, equal to its area. That’s the whole game.
A difficulty ladder
From gentle 7×7 boards to a deep 12×12 Expert. Difficulty comes from the deduction required, never from gimmicks.
Calm by design
Warm paper, soft charcoal, Liquid Glass, five themes, gentle haptics. A quiet place to think.
Challenge a friend
Share today’s puzzle and see who solves it faster. Same board, same start — just a link. The race is yours.
Get Kaku to play