# Sudoku - brain challenge

> Sudoku - brain challenge (iPhone/iPad app by 毅 郑.)

- Source: https://appshunter.io/ios/app/sudoku-brain-challenge/id1180043984 (this page in markdown: same URL + `.md`)
- Developer: [毅 郑](https://appshunter.io/developer/514946161)
- Category: Games, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 12 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2016-12-01
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-brain-challenge/id1180043984/reviews.md

## What is Sudoku?

Sudoku (数独 sūdoku?, digit-single) is a logic-based,combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contains all of the digits from 1 to 9. 
Features:
- each puzzle is generated randomly and have a unique solution
- The difficulty is from easy to very hard
- save game progress automatically and resume at any time
- tap a button to get the solution
- tap a button to get all the possible numbers for each cell
- with a pen tool to draw numbers like on a paper
- in custom mode,input your owner puzzle and get the solution easily
- unlimited undos


## Version history (last 3 releases)

### 1.2 — 2020-06-25

support iPhone X
update to iOS 13

### 1.1 — 2017-03-02

save game on exit or suspend

### 1.0 — 2016-12-01

No release notes.

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## More apps by 毅 郑

- [Evil Bee](https://appshunter.io/ios/app/evil-bee/id516472417)
- [Cute Cat Fishing](https://appshunter.io/ios/app/cute-cat-fishing/id517674603)
- [Happy Skewer](https://appshunter.io/ios/app/happy-skewer/id542188590)
- [Shoot Bubbles](https://appshunter.io/ios/app/shoot-bubbles/id543601332)
- [Classic Spider Solitaire Pro](https://appshunter.io/ios/app/classic-spider-solitaire-pro/id559948339)
- [Mahjong Solitaire - Classic](https://appshunter.io/ios/app/mahjong-solitaire-classic/id585215761)

All apps by 毅 郑: https://appshunter.io/developer/514946161

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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 2026-06-10.*