# Sudoku 9

> A feature-rich Sudoku game with multiple modes and global competition. (iPhone/iPad app by Gyuhyeon Jeon.)

- Source: https://appshunter.io/ios/app/sudoku-9/id403191170 (this page in markdown: same URL + `.md`)
- Developer: [Gyuhyeon Jeon](https://appshunter.io/developer/353770805)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 21 App Store ratings · 65 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 20 MB
- Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 21 more
- Released: 2010-11-15
- Data updated: 2026-08-18
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-9/id403191170/reviews.md

## What is Sudoku 9?

The world's best Sudoku game for iPhone/iPad. 

It provides ease of use and almost every feature you can imagine. 
Enjoy infinite number of sudoku games with powerful features all your life. 
Everyday world sudoku competition 

Features 

- 5 type of Sudoku games
Original sudoku
Greater than sudoku
Killer sudoku 
Calculation sudoku
Symbol sudoku

- Daily Sudoku
Playing same sudoku puzzles with worldwide users everyday

- Facebook/Twitter Integration
Record share on Facebook
Puzzle share on Facebook
Record share on Twitter
Puzzle share on Twitter

- Play again, Watch replay


- Provides infinite number of puzzles at all levels. 
Provides infinite number of puzzles and you can play it all your life. 

- You can choose game level among 5 different levels 

- Auto saving 
Always the state of games will be saved and then you can see the last screen when you restart the game. 

- Memo for candidate numbers 
You can enter candidate numbers in a cell that you don't know the answer immediately. It will help you to play the game. 

- Auto memo
Auto memo is provided. So you can progress the game quickly. 

- Recording game score 
Score of the game is recorded and managed. 

- Resetting game 
If you screw up the game, you can initialize the game. 

- Unlimited undo/redo 
You can go back previous status using undo/redo function. 

- Multiple bookmarks
You can move to saved position using bookmark. You can save 5 bookmarks.

- Supporting 5 languages (English, Korean, Japanese, 2 Chinese) 

- Hint function 
Hint function tells you the answer of a cell when you meet a difficult cell. One hint is provided every 20 minutes.

- Display duplicate numbers 
When you enter a duplicate number, the number will be displayed with different color. It will help you to play games. 

- Full support for Retina display 
Provides clear screen with supporting Retina display 

- When you double tap the screen the mode will be changed to memo mode 

- Display with different color where you need to compare the numbers. 
The cells that you should compare the numbers will be painted with different color. It will help you to play games. 

- Game Center integration
Check worldwide rankings, the best time ranking in each levels
Backup best time and total score to Game Center

- Various settings 
Sound Effects On / Off, change the language, etc.

- Feedback function
You can report a bug or your opinion, and are able to communicate with the developer.

- iOS8 support
- iPhone 6, iPhone 6 Plus support
- World ranking page

## Key features

- 5 types of Sudoku games
- Daily worldwide Sudoku competition
- Infinite puzzles at all levels
- Auto-saving and unlimited undo/redo
- Memo for candidate numbers
- Hint function
- Game Center integration for rankings

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Hint 50 | $0.99 | one-time |
| No Advertisement | $2.99 | one-time |


## Recent user reviews (10 of 65)

All indexed reviews: https://appshunter.io/ios/app/sudoku-9/id403191170/reviews.md

### 4/5 — 틀린숫자 입력시 오류 신호가 있었으면

*2026-03-09*

그 자리에 틀린숫자를 입력하면 바로 붉은 색으로 오류 표시가 되었음 좋겠어요. 잘못된 숫자 입력 후 오류 나올때까지 한참 숫자입력하고 나중에 잘못임을 알게되니 짜증이~~

### 4/5 — 좋습니다

*2025-07-04*

디자인도 깔끔하고 색상선택만 잘하면 눈도 편해서 좋습니다!

### 5/5 — Great puzzles

*2025-01-28*

I love all the options of the different Sudoku games, as well as the levels of difficulty. Plus, you can track your performances and compete against your own time records. Ads are minimal and never during your game. I recommend this one.

### 5/5 — 광고만 쫌 짧았으면…

*2024-11-08*

시간순석이네요 몇판하다보면 몇십분 가있어요 버스기다리면서 하기 좋은겜
단하나 아쉬운거라면 광고 30초짜리는 조금 짜증나긴 하네요

### 5/5 — No ads!

*2024-11-06*

So far the best sudoku that I’ve played. Never interrupted with ads. Multiple levels of difficulty. Similar to sumdoku that I find in puzzle books. This stays on my phone for years. I may have data turned off, not sure, but no ads!

### 4/5 — 문의합니다

*2024-10-27*

인앱 구매를 했는데 유료앱이 기기간 공유도 되지 않고 가족공유도 되질 않습니다. 해결 방법이 궁금합니다.

### 5/5 — Great game

*2024-10-04*

Great game with lots of variety

### 4/5 — 広告

*2024-07-21*

2回に一回表示されますが、他の広告表示系のゲームアプリと比べるとそこまで執拗では無いので箸休みみたいなものとして割り切ればそこまで気にならないと思います。ゲーム内容としては数独として変則ルールのものも含めて色々揃ってますので、楽しめます。

### 5/5 — とても良いです。

*2024-04-26*

頭のトレーニングと暇つぶしに役立ってます。

### 4/5 — 퀘스트 진행사항..

*2024-03-18*

반영 잘 안되는건지.. 제가 잘 못한건지...

## Frequently asked questions about Sudoku 9

### What types of Sudoku puzzles does Sudoku 9 offer?

Sudoku 9 offers five distinct types of Sudoku games: Original Sudoku, Greater Than Sudoku, Killer Sudoku, Calculation Sudoku, and Symbol Sudoku, providing a diverse puzzle experience.

### Can I play Sudoku 9 offline?

The provided description does not explicitly state whether Sudoku 9 supports offline play. However, features like daily competitions and social sharing suggest an online component is necessary for full functionality.

### How does the daily Sudoku competition work in Sudoku 9?

In the daily Sudoku competition, you play the same puzzle as users worldwide each day. This allows for comparison of your performance against a global player base.

### What are the different difficulty levels in Sudoku 9?

Sudoku 9 allows you to choose your game level among 5 different difficulty levels, ensuring a challenge for players of all skill sets.

### How often is Sudoku 9 updated?

Sudoku 9 was last updated on March 25, 2024, indicating a relatively active development cycle. The latest version is 4.930.

### What languages does Sudoku 9 support?

Sudoku 9 supports 5 languages: English, Korean, Japanese, and 2 Chinese dialects, making it accessible to a wider international audience.

### How does the hint function work in Sudoku 9?

The hint function in Sudoku 9 provides the answer to a cell when you encounter difficulty. One hint is provided every 20 minutes, helping you progress through challenging puzzles.

### Is Sudoku 9 available on Android devices?

Based on the provided data, Sudoku 9 is designed for iOS devices, specifically supporting iPhone, iPad, and iPod. It is not indicated to be available on Android.

## Version history (last 5 releases)

### 4.930 — 2024-03-25

Bug fixes and some feature improvements

### 4.920 — 2024-03-19

Bug fixes and some feature improvements

### 4.910 — 2024-01-17

Advertising policy changes

### 4.800 — 2020-11-13

- Fixed bugs

### 4.700 — 2020-09-24

- Support iOS14

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## More apps by Gyuhyeon Jeon

- [반야심경](https://appshunter.io/ios/app/id353770802)
- [천수경](https://appshunter.io/ios/app/id356792134)
- [Diamond Sutra - 金剛經 free](https://appshunter.io/ios/app/diamond-sutra-free/id360391866)
- [Sudoku9 Pro](https://appshunter.io/ios/app/sudoku9-pro/id386917779)
- [Sudoku 6](https://appshunter.io/ios/app/sudoku-6/id568783854)

All apps by Gyuhyeon Jeon: https://appshunter.io/developer/353770805

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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 2026-08-18.*