About this app
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
Latest release
What’s New
· 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.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 23, 2026 · 4:23 PM Free
Screenshots
