iPhone Screenshots


Featured by Apple as "Best Math Puzzle Game" and "New and Noteworthy"

NineGaps is a highly addictive and tricky puzzle game.

The goal of the game is really simple. You have to use your wits to place numbers from 1 to 9 in the missing gaps, while matching the operations presented in the puzzle. It's just like sudoku, but different!

• simple and unique puzzle-based gameplay
• cute graphics
• 5 difficulty levels
• unlimited brain burning puzzles
• global and friend leaderboards
• achievements
• GameCenter integration
• highly addictive and fun!

Fans of Sudoku, KenKen and TwentyFour will feel right at home!

Test your puzzle cracking skills with NineGaps today!

..."sudoku-style puzzle game featuring a clever twist", Macworld
..."polished, fantastic looking iPhone app that anyone can enjoy", MacYourself
..."there is no reason this great puzzle app shouldn't be downloaded today", AppModo
..."with random boards the replayability is pretty much endless", In Touch Reviews
..."simple game with a simple design and does it simply perfect", GameZebo
..."make way for another highly addictive game coming out for your iPhone", Mobilewhack
..."great for all ages whether you want a math refresher or a fun way to teach kids math skills", The AppPodcast
..."this is a simple looking brain burning challenger", iPhone Footprint
..."sudoku meets calculator, has baby, calls it NineGaps", Mobile Game Faqs
..."highly addictive puzzle game", iPhone Toolbox
..."fun and challenging", AppChatter
..."easy to pick up and hard to put down", iPhone App Reviews

- Visit us: ninegapsapp.com
- Follow us: twitter.com/quadionTouch
- Become a fan: facebook.com/pages/Quadion-Technologies/65161686424

Check out our other exciting games: Rune Trails and Wordweaver

What’s New

Version 1.6

We've refreshed our app to be back in the store and work again with newer devices and iOS.

We hope you enjoy NineGaps!

Ratings and Reviews

4.0 out of 5
11 Ratings

11 Ratings

Mahalis ,

Clever concept; some implementation issues

This is a great idea for a game. The art style works well, and it's just the right mix of mindless and challenging to kill a few minutes—or significantly more—with. One issue that I've had is that I can't tell what piece I've picked up, from the ones available, until I've already dragged it some distance; having grabbed pieces expand, or just spreading out their initial positions more (along the side, maybe?) would help a lot with that. Regardless, an excellent game.

Stangster1 ,

Unmatched simple brilliance

If you're pretty good at math, this is a game that's beautifully challenging and beautiful to look at as well. Perfection.

TaiGer31 ,

Great game but needs a few things...

I really like this game. I'm not one of those people tht did great in math & I really think that this game can get the old brain juices flowing. I really wish that when I close the app that it would come back to the last incomplete game, that wld be really helpful. Also maybe a help button for us math challenged folks. I have really gotten stuck on some of these things. One more thing, if it had a reveal button that showed the answer if u just can't figure it out. Other than that, I love the challenge and I believe w/ these few updates it wld definitely be 5 star worthy!

App Privacy

The developer, Quadion Technologies, 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.


  • 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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