# John’s Sudoku — Pro Version

> A comprehensive Sudoku game system with customizable puzzles and advanced gameplay aids. (iPhone/iPad app by shaojun lin.)

- Source: https://appshunter.io/ios/app/johns-sudoku/id1263579054 (this page in markdown: same URL + `.md`)
- Developer: [shaojun lin](https://appshunter.io/developer/1263579053)
- Category: Health & Fitness, Games, Puzzle
- Price: $4.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.4 · 12 MB
- Languages: English, Japanese, Chinese
- Released: 2017-08-07
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/johns-sudoku/id1263579054/reviews.md

## What is John’s Sudoku?

John's Sudoku is one of the most comprehensive Sudoku game systems.  It randomly creates puzzles for six difficulty levels.  You may never meet the same puzzle.  But you can do the same one via user defined puzzle.  Or you can define your own puzzle via Sudoku Book.  You can also share the same puzzle with your friends via the importing/exporting function of this system.  The followings are the summary of the function:

1. Randomly creates puzzle for six difficulty levels.
2. User can define his/her own puzzle, e.g. from Sudoku Book. 
3. Check the status and highlight the error.
4. Easy to see the working cells with the most advanced highlighting function. 
5. Auto-pencil the selected cell. 
6. Undo/Redo function. 
7. Auto-pencil (or auto-erase) all the cells with one tap.
8. Revert to the last clean state via 'Eliminate error input'.
9. Resolve the puzzle . 
10. Import/export your puzzle to share with friends.
11. Reset to the original puzzle. 
12. Game is auto-saved. You only need 
to tap Resume when you return to the app.

1. 随机产生六个难度级别的拼图。
2. 用户可以定义自己的拼图，例如从数独书。
3. 检查状态并突出显示错误。
4. 使用最先进的突出显示功能轻松查看工作单元格。 
5. 自动标记所选单元格。 
6. 撤消/重做功能。
7. 一键自动标记（或擦除）所有单元格。8. 可以通过 ‘消除错误输入’ 返回到上个正确状态 。
9. 拼图解题功能。
10. 通过输入/输出拼图以与朋友分享乐趣。 
11. 重新设定到原始的拼图。 
12. 游戏自动保存，您只需点击“恢复”即可。

## Key features

- Randomly generated puzzles
- Six difficulty levels
- User-defined puzzles
- Puzzle sharing via import/export
- Error highlighting
- Auto-pencil and undo/redo
- Auto-save game progress

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/johns-sudoku/id1263579054/reviews.md

### 5/5 — Good app

*2021-04-08*

Exercise the brain, challenging, very interesting, will always be used

## Frequently asked questions about John’s Sudoku

### What is John’s Sudoku?

John’s Sudoku is a comprehensive game system for playing Sudoku puzzles. It offers randomly generated puzzles across six difficulty levels, as well as the ability for users to define their own puzzles and share them with friends.

### How many difficulty levels does John’s Sudoku offer?

John’s Sudoku provides puzzles across six distinct difficulty levels, ensuring a challenge for both beginners and experienced players.

### Can I create my own Sudoku puzzles in John’s Sudoku?

Yes, you can define your own puzzles in John’s Sudoku, either by creating them from scratch or using content from a Sudoku Book. You can also share these custom puzzles with friends.

### Does John’s Sudoku have any helpful features for playing?

John’s Sudoku includes advanced features like error highlighting, auto-pencil for selected cells, undo/redo functionality, and the ability to revert to a clean state. It also offers an option to resolve the puzzle.

### How is my game progress saved in John’s Sudoku?

The game in John’s Sudoku is automatically saved, allowing you to simply tap 'Resume' when you return to the app to pick up where you left off.

### What devices is John’s Sudoku compatible with?

John’s Sudoku is compatible with iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### How often is John’s Sudoku updated?

The latest version of John’s Sudoku is 4.0.0, and it was last updated on July 15, 2024. This indicates regular maintenance and potential feature additions.

### Does John’s Sudoku have ads?

No, John’s Sudoku does not contain advertisements. As a paid application, it offers an uninterrupted gaming experience without any ads.

## Version history (last 5 releases)

### 4.0.0 — 2024-07-15

Adding leaderboard

### 3.1 — 2021-03-12

improved the cell color scheme for dark appearance

### 3.0 — 2021-02-27

Added black/white background color option for puzzle cells
Added iMessage extension for easy sharing

### 2.0.0 — 2019-10-01

Supported iOS 13 dark mode

### 1.1 — 2018-04-27

1. Fixed small bugs
2. Improved the layout for iPad
3. Release all the functions to the free version (with ads)

## Apps similar to John’s Sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Lazy Eye Bubble Shooter](https://appshunter.io/ios/app/lazy-eye-bubble-shooter/id975380960) | 1.0 (1) | $27.99 | Health & Fitness |

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- [ZPYBookkeeper:)](https://appshunter.io/ios/app/zpybookkeeper/id1417593249)

All apps by shaojun lin: https://appshunter.io/developer/1263579053

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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.*