Free sudoku app with no ads
I played a lot of sudoku on my phone, and every app I tried was either full of ads or wanted money before I could start a puzzle. So I built my own and called it Sudoku – No Ads, Unlimited.
Five difficulty levels, from a first puzzle to one that will genuinely hold you up.
4.4 out of 5 on the App Store
Features
Natural controls
The number pad sits under the board within reach of a thumb, and every tap answers with haptic feedback.
Error highlighting
Turn it on and a wrong number is flagged as it goes in. Leave it off and nothing interrupts.
Dark mode
The board follows the system appearance and turns dark with the rest of the device.
Statistics
Times and streaks per difficulty, so improvement is visible.
Five difficulties
Easy to Extremely Hard, graded by the solving techniques each puzzle actually needs.
Smart notes
Pencil marks update themselves as the board fills in.
Unlimited undo
Step back as far as you want, one move at a time.
iCloud sync
Start a puzzle on a phone and finish it on an iPad.
Plays offline
Every puzzle is generated and solved on the device. No connection, no interruptions.
Built to stay out of the way
- Free
- No purchase, no subscription, nothing locked away.
- No ads
- No banners, no pop-ups, no videos to sit through.
- No account
- Nothing to sign up for and no email to hand over.
- No nagging
- No push notifications, no experience points, no streak to keep alive.
Reviews on the App Store
4.4
104 ratings on the App Store
Just Sudoku
No ads, no gimmicks, no constant calls to upgrade. And it's available offline. What's not to like?
Simple, Effective
There is no lie in the title. Just Sudoku. No ads, no limits, no in app purchases. Perfect sudoku app.
Love
Love how simple and straight forward the app is and I'm so glad I found it after searching and searching for a great app that didn't want so much information from me. Thank you for that!
Plays in six languages
Every menu, hint and statistic is translated. Sudoku follows whichever language the device is set to.
- English
- Deutsch
- Español
- Français
- 日本語
- Svenska
iPhone and iPad
The same app on both, laid out for the screen it is on. iCloud keeps the board and the statistics in step, so a puzzle started on a phone can be finished on an iPad.
- iPhone
- iPad
Questions about the app
- Is Sudoku really free?
- Yes. It costs nothing to download, there are no in-app purchases, no subscription and no paid tier. Every difficulty and every feature is there from the first launch.
- Are there any ads?
- No. There are no banners, no full-screen ads between puzzles and no videos to watch before you can carry on. The app has no advertising in it at all.
- Does it work offline?
- Yes. Puzzles are generated and solved on the device, so the app works on a plane, on the underground and in aeroplane mode.
- Do I need an account to play?
- No. There is no sign-up, no login and no email address to give. Open the app and start a puzzle.
- How many difficulty levels are there?
- Five, from Easy to Extremely Hard. Each puzzle is graded by the solving techniques it actually requires, so Easy stays easy and Extremely Hard earns the name.
- Does it have pencil marks?
- Yes. Notes update themselves as numbers go into the board, so a possibility that is no longer valid disappears on its own.
- Is there a dark mode?
- Yes. The board and the number pad follow the appearance set on the device, so Sudoku turns dark when the rest of the system does.
- Which languages does it speak?
- English, German, Spanish, French, Japanese and Swedish. The app follows the language set on the device.
- Which devices does it run on?
- iPhone on iOS 18.6 or later and iPad on iPadOS 18.6 or later. A puzzle started on one carries over to the other through iCloud.
- Is there an Android version?
- No. Sudoku is written for Apple platforms only and there is no Android or web version.
- What data does the app collect?
- Anonymous usage data, so I can see which parts of the app people use. It is not tied to an identity, it cannot be matched against any other app, and it can be switched off in the app's Privacy screen.
Get Sudoku
Free on the App Store, for iPhone and iPad. No ads, no account, nothing to cancel.