# Shikaku Zen: Rectangle Puzzle — Calm Japanese logic grids

> Calm Japanese logic grids (iPhone/iPad app by Jeroen Lamberts.)

- Source: https://appshunter.io/ios/app/shikaku-zen-rectangle-puzzle/id6790501620 (this page in markdown: same URL + `.md`)
- Developer: [Jeroen Lamberts](https://appshunter.io/developer/6774289436)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 15 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, European Spanish
- Released: 2026-07-29
- Data updated: 2026-08-01
- User reviews in markdown: https://appshunter.io/ios/app/shikaku-zen-rectangle-puzzle/id6790501620/reviews.md

## What is Shikaku Zen?

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/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $14.99 | per year |



## Version history (last 1 release)

### 1.0 — 2026-07-29

No release notes.

## More apps by Jeroen Lamberts

- [Home viewing - house checklist](https://appshunter.io/ios/app/home-viewing-house-checklist/id6774289434)
- [TextFate: Detective Stories](https://appshunter.io/ios/app/textfate-detective-stories/id6776581352)
- [Drift: Ambient Sleep Sounds](https://appshunter.io/ios/app/drift-ambient-sleep-sounds/id6789172319)
- [Life Calendar: Life in Weeks](https://appshunter.io/ios/app/life-calendar-life-in-weeks/id6790700264)

All apps by Jeroen Lamberts: https://appshunter.io/developer/6774289436

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*