KenKen® - Brain Training Puzzle

Train your brain with KenKen®, the unbelievably fun, exciting and addictive logic and math puzzle! KenKen is an amazing puzzle that is frequently described as “sudoku on steroids.” If you like other brain games such as sudoku, 2048, Threes, Kakuro, Unblock Me, Tricky Test, Tetris, Flow, jigsaw puzzles, word search puzzles, or crossword puzzles, then you will LOVE KenKen!

This is the ONE-AND-ONLY Original KenKen app, created by acclaimed Japanese mathematics educator Tetsuya Miyamoto. Don’t be fooled by unauthorized versions such as mathdoku and calcudoku, and don't get stuck in a sudoku rut. Play KenKen math puzzles today!

KenKen appears daily in the New York Times and hundreds of other publications around the globe. NY Times puzzle editor, Will Shortz, calls KenKen "the most addictive puzzle since sudoku."

There are virtually unlimited KenKen puzzles available to you on this app. The first 50 are included FREE with the download. If you need problem! Just order them and they'll appear immediately. YOU select the size, difficulty level, and operations.

KenKen Classic includes:
- 50 FREE fun math puzzles of every size and difficulty level
- Unlimited FREE 3x3 size puzzles to learn from and enjoy
- Virtually unlimited puzzles, ranging from 3x3 to 9x9 grids, from Easy to Expert
- A variety of color schemes and music (you can even set your own music to play in the background)
- 3 input modes for digits and notes
- Great extra features such as Hints, Check, Undo, Redo, Reset, Pause, and Timer
- Online leaderboards
- Ability to post results directly to Twitter
- Ability to email results and invite friends

What’s New

Version 2.7

Small fixes and tweaks ... making things better.

Ratings and Reviews

4.6 out of 5
1.2K Ratings

1.2K Ratings

Swier1954 ,

Addicted but forced to stop playing by bugs.

I have been playing for many years, 2-5 puzzles per day. I only play expert and once I have played all expert offered, there are no more, even though I have purchased new puzzles. I have no wish to play any but expert, but am unable to do so as only so many are available. Also, the now 10-15 minute download time for EACH puzzle is unacceptable to me. Also, the supposedly ad free puzzles, are not ad free at all, forcing one to "buy" as the only alternative, and unable to get back to ken ken. Frustration complete. Please clean up this app, and give me back the most enjoyable, and healthy, experience of my day. You guys! I haven't had any 789-hard, expert for months. But now I'm doing old puzzles in those categories and halfway through being sent back. PLEASE, PLEASE, PLEASE. SEND NEW 789- hard, expert.

Thank you thank you for replenishing my 9 Expert as I work. It’s made all the difference. I can now do my 5/day without worrying about running out.

Developer Response ,

Thank you for playing KenKen. We apologize for any problem you're having. The app has virtually unlimited puzzles of all sizes and types, which are automatically replenished as you play (*internet connection required). Most issues are resolved with a delete and reinstall of the app. Let us know if you need further instructions how to delete the app completely. You will not incur any charge, and your available puzzles will be reinstated. Let us know if the reinstall resolves the issue.

dscovry ,

Great App, Great Support

KenKen is my “Go To” app. I almost only work them on my iPad and primarily 9X Medium level, which I usually solve between 15-30 minutes. I don’t like spending much more time than that on a single puzzle, which is why I don’t do higher level puzzles on a regular basis. I limit my iPhone to 7X Med because of the size of the screen on bigger puzzles. Great for killing time in the doctor’s office. I find KenKen a great way to “clear my head” when I’m overthinking a problem at home or work. After 2 or 3 puzzles, the solution to the problem at hand seems to “pop” into my head. I’ve had a few problems with earlier releases, but the support was great and they addressed them quickly.

AIHReview ,

Many games can't be solved without guessing.

The games are machine generated, and many (at the expert level, at least) require guessing to solve. Kenken is a LOGIC game, not a guessing game. The UI is also frustratingly bad, requiring multiple taps to do simple things like change note color, and it's easy to change notes inadvertantly.

The developer's response is simply not true. I've played several games, for example, where the last 10 moves or so could be played out two ways, both of which yielded a correct result, but only one of which was deemed as a win. Several games were simply not solvable without playing out a guess until it failed, then backing out to the decision and choosing the other alternative. That's not "considering," it's guessing. No machine-generated game should be posted if it hasn't been solved by a human player who can't project 20 moves out. Also, the UI becomes more and more frustrating over time.

At present, this is the only alternative on the app store, given that the older (and excellent) "Will Short" app doesn't run under the most recent iOS version, but it's not a great alternative. I'll move to a competitor in a heartbeat if an alternative appears in the store.

Developer Response ,

Thank you for playing KenKen. Our KenKen puzzles are all composed by a computer program called the Kenerator, which has been developed using advanced artificial intelligence techniques. The Kenerator checks every puzzle to ensure that the totals in all the cages are correct, and that no row or column has the same number
more than once. The Kenerator also verifies that there is only one solution to each puzzle. Sometimes solvers contact us, believing they have found a flaw in a puzzle, but up to now no puzzle generated by the Kenerator has ever been found to have an error. We would, of course, want to know if an error did exist in any of our puzzles, and so we do not wish to discourage solvers from contacting us. If you ever find a game that's "not solvable" or you think has an alternative solution, please take a screen shot and send it to us at and we can respond with the solving technique and/or correct solution.


KenKen Puzzle, LLC
45.2 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© KenKen Puzzle LLC
In-App Purchases
  1. 250 Puzzles PLUS removal of all ads! $7.99
  2. 31 Puzzles PLUS removal of all ads! $1.99
  3. 1000 Puzzles PLUS removal of all ads! $14.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

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

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