# Cheondoku - Easy Sudoku — Sudoku for a calm, quiet mind

> Sudoku for a calm, quiet mind (iPhone/iPad app by TYstudio.)

- Source: https://appshunter.io/ios/app/cheondoku-easy-sudoku/id6776934551 (this page in markdown: same URL + `.md`)
- Developer: [TYstudio](https://appshunter.io/developer/6776933971)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 53 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), European Spanish
- Released: 2026-07-09
- Data updated: 2026-10-09

## What is Cheondoku?

New to number puzzles? That is perfectly fine.
Cheondoku is sudoku that deepens slowly, without pressure.

◆ 6x6 Warm-Up — Free
Start small and easy. Ideal for anyone picking up sudoku for the first time.

◆ Zen, Sun, Moon — Three Paths (1,000 puzzles each)
· Zen — Stillness. Before sleep, during meditation.
· Sun — Vitality. The first puzzle of the morning, at a cafe.
· Moon — Quiet. A calm night when rest won't come.
Three palettes, three depths. A 3,000-puzzle journey that grows with you.

◆ Difficulty for Everyone
From beginner to easy. Hints are there when you need them, and mistakes are part of the process.

◆ Quiet Design
No flashy effects — just an interface that lets your thoughts settle.
Ten minutes a day to clear your mind.

[How It Works]
· Free to download — the 1,000 Zen 9x9 puzzles and the 6x6 warm-up are free to play, with ads.
· One purchase opens Sun and Moon — 2,000 more puzzles, all 3,000 in hand — and removes every ad.
· There is a single in-app purchase. A one-time payment, not a subscription.

Contact: support@kingdoku.com

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| All Packs (Zen+Sun+Moon) | $2.99 | one-time |


## Is Cheondoku safe?

Not enough ratings yet to assess Cheondoku.

## Is Cheondoku legit?

Cheondoku - Easy Sudoku appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Cheondoku is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.4 — 2026-08-14

· Fixed a freeze when resuming a puzzle you had left in progress.
· Fixed the timer starting before the ad was closed.
· The first screen's button is now "Enter", so it no longer looks identical to "Start" on the home map.
· Removed the brief unresponsive moment right after launch.

### 1.0.3 — 2026-08-13

One purchase, and nothing else to buy.

· There is now a single product — Unlock Everything. One purchase opens all 2,000 Sun and Moon puzzles and removes every ad.
· The price is lower than before.
· The 1,000 Zen puzzles and the 6×6 warm-up stay free, just as they are.

### 1.0.2 — 2026-08-07

• Ads are now included — but the first 3 puzzles stay ad-free, and after that you will only see one every other puzzle.
• Prefer no ads at all? Any pack purchase removes them for good.
• Small stability improvements.

### 1.0.1 — 2026-07-15

Stability improvements and small refinements.

### 1.0 — 2026-07-09

No release notes.

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| [Hidden Spots - Hidden Objects](https://appshunter.io/ios/app/hidden-spots-hidden-objects/id6736755876) | 4.7 (40,090) | Free | Games |
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## More apps by TYstudio

- [Anyletics](https://appshunter.io/ios/app/anyletics/id1537919212)
- [Baekdoku - Infinite Sudoku](https://appshunter.io/ios/app/baekdoku-infinite-sudoku/id6776933969)
- [Daily Brain+ : Senior Workout](https://appshunter.io/ios/app/daily-brain-plus-senior-workout/id6779509269)
- [DokuBook - Print Sudoku](https://appshunter.io/ios/app/dokubook-print-sudoku/id6791158118)

All apps by TYstudio: https://appshunter.io/developer/6776933971

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*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 2026-10-09.*