Play 4 brain teasing logic games - Sudoku | Killer Sudoku | MathDoku | X-Sudoku - with thousands of puzzles.

Don't get stuck - 9 digits' helpers guide your next move and teach you solution strategies.

• choose levels from beginner to master
• easily enter digits and pencil marks
• get step-by-step hints for your next move
• unique solutions, no guessing needed
• plenty of settings to tweak your game experience
• no ads

9 digits was created by Ivonne & Marcus who love to play logic games.

What’s New

Version 1.4.0

• iPad support
• new setting: no automation for removing obsolete pencil marks

Ratings and Reviews

5.0 out of 5
14 Ratings

14 Ratings

lookwhatihavefound ,

Best Sudoku App, by far

This is a real tool for players that are serious about Sudoku. There are many many puzzles at many skill levels. The amazing, amazing hint system actually teaches you how to play better. The app is super smooth and responsive at all times. No competition.

mwvermillion ,

Genius interface

The best user interface I have ever seen in a Sudoku game. The use of color and position to stimulate additional parts of the brain is a great plus

Lilu666 ,

Already love it

Looks much more fun and colorful than most sudoku apps and has a good selection of games and an intuitive pencil mark interface

App Privacy

The developer, Marcus Wagner, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Marcus Wagner
6.9 MB

Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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