Shikaku Zen: Rectangle Puzzle

Shikaku is Japan's most elegant logic puzzle. Divide the grid into rectangles so that every rectangle contains exactly one number — and that number equals its area. Simple to learn, deeply satisfying to master.

Shikaku Zen wraps that classic rule in calm: soft washi paper, gentle haptics, warm koto sounds, and a friendly koi to keep you company. It's a pocket of quiet in a noisy day.

• 100 hand-shaped levels across five packs, from gentle 5×5 grids to deep 9×9 challenges
• A fresh daily puzzle with streaks to keep the habit
• Every puzzle is generated on your device and guaranteed to have exactly one solution
• Draw rectangles with a natural drag; tap to erase; unlimited undo and gentle hints
• Beautiful in light and dark
• Play fully offline — anywhere, anytime

No ads. No account. No tracking. Just puzzles.

SHIKAKU ZEN PRO
Unlock all four advanced packs — Blossom, Stream, Stone and Master (80 extra levels) — with a yearly subscription or a one-time lifetime purchase. The daily puzzle and the first pack are always free.

Payment is charged to your Apple Account. A yearly subscription renews automatically unless cancelled at least 24 hours before the period ends; manageor cancel anytime in your Account settings. The lifetime option is a single purchase.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/