Last updated on January 17th, 2026 at 10:23 am
Sudoku 9 – Board Game Review
Sudoku 9 is a Board/Puzzle/Entertainment game from Gyuhyeon Jeon, first launched in 15th November 2010.
It’s rated 4+ and currently has 21+ ratings on the App Store.
What Makes Sudoku 9 Stand Out
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
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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
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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
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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)
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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
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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
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iPhone 6, iPhone 6 Plus support
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World ranking page
This Board game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Sudoku 9 is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 25th March 2024
Recent improvements include:
Bug fixes and some feature improvements
Download & Availability
Sudoku 9 is available through the official App Store for iOS devices.
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
We 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. We recommend this one.
So far the best sudoku that Ive played. Never interrupted with ads. Multiple levels of difficulty. Similar to sumdoku that we find in puzzle books. This stays on our phone for years. We may have data turned off, not sure, but no ads.
Great game with lots of variety.
We use this almost daily but the pop up ads are annoying and the font is too small to use without glasses.
Stimulating have turned several others on to it to help improve math skills.
We are deleting this game. After playing it for a few years and really loving it, it now promises extra hints, but doesnt deliver and at the end of a game it takes over our phone with stupid games we are not interested in. But they wont leave unless we play a round. Very dissatisfied and disappointed. Goodbye and good riddance.
We love sudoku and when we found out there were different versions we searched for an app that had em this one does!! Love it we're addicted just wish they had more different ones like Blackout sudoku and jigsaw sudoku.
We really enjoy this app. Ads are not too obnoxious for a freebie.
This is one of our favorites. We love the challenges this gives us. We play this on a daily basis to keep our brain challenged. We love the math in it.
This is a nice app to challenge yourself. It works perfectly and has a nice variety of levels.
Sudoku 9 is one of the more fun games that we play. The only thing we would change is it needs more help for user entered games. You need to make hints available.
This app is one of the only ways to play killer sudoku with sums. Our only complaint is that we can't control the sound without it changing the volume if the ringer. Most apps have the sound separate from phone volume, we would recommend changing that.
This app is great. It has given many hours of enjoyment. Basic feature is really good, and puzzle share on facebook function is awesome.
Hard to stop playing. Much better than a paper game and other sudoku apps.
There are all kinds of Sudoku game. Powerful, Fast, Fantastic.
Many good functions to play game. Try this one.
It's the best sudoku among we have done. Most convenient.
User feedback from Apple App Store
App Details
- Version: 4.930
- Size: 20.46 MB
- iOS: 12.0 or later
- Languages: AR, CA, CS, DA, NL, EN, FI, FR, DE, EL, HE, HU, ID, IT, JA, KO, MS, NB, PL, PT, RO, RU, ZH, SK, ES, SV, TH, ZH, TR, UK, VI
- Content Advisory:
- Developer: Gyuhyeon Jeon
Last updated: 25th March 2024 | Genre: Board, Puzzle | Developer: Gyuhyeon Jeon