Zen – Shikaku

Contact Us

For bug reports, feedback, account questions, or anything else related to the app, email us directly:

How to Play

Shikaku (also called Rectangles) is a logic puzzle. Your goal is to divide the grid into rectangles so that every cell is covered exactly once.

1. One number, one rectangle. Each numbered cell shows how many cells its rectangle must contain. A “3” must sit inside a rectangle of exactly 3 cells.
2. Draw rectangles. Press and drag on the grid to draw a rectangle. Release to place it. Tap an existing rectangle to remove it.
3. Fill every cell. When the puzzle is solved, every cell belongs to exactly one rectangle, and every number matches its rectangle’s area.
4. Use tools. Undo reverses your last action. Hints (up to 3 per puzzle) highlight a number or reveal a correct rectangle. Reset clears your progress on the current puzzle.

Game Modes

• Daily Puzzle — a new puzzle each day, shared by all players
• Puzzle Library — easy, medium, and hard puzzles to solve at your own pace
• Zen Mode — endless random puzzles with no timer pressure
• Gallery — discover artworks as you complete puzzles

Settings

Open Settings from the home screen to toggle the timer, shape hints on numbered cells, haptic feedback, background music, and reduced motion.

Frequently Asked Questions

• How much does Zen – Shikaku cost?

  Zen – Shikaku is a one-time purchase — $2.99 USD on the App Store and Google Play. The exact price may vary by country or region according to each store’s local pricing. There are no in-app purchases or subscriptions; once you buy the app, all puzzles and features are included.
  
  And yes, that includes the daily puzzles and any future updates to the app!

• Do I need an account or internet connection?

  No account is required. Bundled puzzles work fully offline. An internet connection is needed to download new puzzles from the feed and to receive app updates.

• Where is my progress saved?

  All progress, statistics, achievements, and settings are stored locally on your device. We do not operate cloud sync or user accounts. If you uninstall the app or clear its storage, that data is removed unless it was included in your device’s system backup (e.g. iCloud or Google Backup).

• How do hints work?

  Each puzzle includes up to 3 hints. A hint either highlights a numbered cell that still needs a rectangle, or reveals one correct rectangle on the board. Hints cannot be used after the puzzle is solved.

• Why can’t I place a rectangle?

  A rectangle is rejected if it overlaps another rectangle, if it extends outside the grid, or if its area does not match the number inside it (when a number is present). Try a different size or position, or remove an existing rectangle first.

• How do I get new puzzles?

  Pull down to refresh on the home screen when online to fetch the latest puzzle feed. The daily puzzle updates automatically each day. Zen Mode generates a new random puzzle whenever you finish one.

• What data does the app collect?

  Zen – Shikaku does not require personal information and does not use advertising or analytics trackers. Gameplay data stays on your device. For full details, see our Privacy Policy.

Troubleshooting

App won’t load new puzzles

• Check that your device has an active internet connection.
• Pull down on the home screen to refresh the puzzle feed.
• Force-quit and reopen the app. Bundled puzzles remain available offline.

Progress seems lost

• Progress is stored on the device where you played. It does not transfer automatically to a new phone or tablet.
• Restoring from an iCloud or Google device backup may recover app data if a backup was made before the loss.

Sound or haptics not working

• Check Settings in the app — background music and haptic feedback can be toggled off.
• Ensure your device is not in silent mode and system volume is turned up.
• Verify haptics are enabled in your device’s system settings.

App crashes or freezes

• Update to the latest version from the App Store or Google Play.
• Restart your device.
• If the problem persists, email us with your device model, OS version, and what you were doing when the issue occurred.

App Information

App Name

Zen – Shikaku

Version

1.0.0

iOS Bundle ID

com.shikaku.app

Android Package

com.shikaku.app

Download or update the app:

Privacy Policy