Kakuro are addictive logic puzzles best described as number-crosswords. Using pure logic and simple add/subtract calculations, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

Each puzzle consists of a blank grid with sum-clues in various places. The object is to fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.

The game includes zoom for easier solving of large puzzles, as well as helpful features such as showing possible sum combinations in a block, showing the sum remainder of a block, and using pencilmarks to make temporary placement of numbers in the grid.

To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format.

For more fun, Conceptis Kakuro includes a Weekly Bonus section providing an extra free puzzle each week.


• 120 free Kakuro puzzle samples
• Extra bonus puzzle published free each week
• Multiple difficulty levels from very easy to extremely hard
• Puzzle library continuously updates with new content
• Manually selected, top quality puzzles
• Unique solution for each puzzle
• Hours of intellectual challenge and fun
• Sharpens logic and improves cognitive skills


• Concurrently playing and saving multiple puzzles
• Puzzle library sorting and hiding options
• Graphic previews showing puzzles progress as they are being solved
• Unlimited Undo and Redo
• Enlarge, reduce, move puzzle for easy viewing
• Pencilmarks for solving hard puzzles
• Autofill pencilmarks mode
• Show Sum Combinations feature
• Show Sum Remainder feature
• Check puzzle
• Track puzzle solving times
• Backup & restore puzzle progress to iCloud


Kakuro have also become popular under other names such as Kakkuro, Cross Sums and Tashizan Cross. Similar to Sudoku, Hashi and Slitherlink, the puzzles are solved using logic alone. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.

What’s New

Version 2.1

This version improves performance and stability.

Ratings and Reviews

4.8 out of 5
481 Ratings

481 Ratings

St Paul Hope ,

So much fun and reasonable cost

This game is well developed, lots of nice UX touches that make it fun to play. I really like being able to buy a batch of puzzles for a reasonable cost, rather than have it messed up by ads or need to pay a monthly subscription (which I probably wouldn’t.)

Once I get into the Very Hard category, I usually need to do some guessing - it would be cool to have some solving hints (not the answers, but a principle I could use in certain situations to figure it out).

But I bet I could find that info out there if I decide to research it.

I really like the feature where I can auto-pencil all the hint possibilities at once. I like to figure out the hint possibilities on my own, but if I mess something up and need to erase them all, it makes it a lot less tedious not to have to go through all that logic again, and just re-add them properly.

The undo and redo are really nice features also.

Developer Response ,

This issue is actually a bug in iOS 14, and that's why you saw it as soon as you did the update. We found a workaround and will release an update soon which will fix this issue.

dehkid ,

Next best app to Primo Kakuro

Let me preface this review by saying that Primo Kakuro was hands-down the best Kakuro app out there. Unfortunately, the developers have chosen not to upgrade their app to work with the new iPhone iOS. Perhaps they’ve decided to concentrate on their knitting apps (???!!!). They hadn’t added any more puzzle packs in a long time anyway, and I’ve been through them all. So I was forced to find a new app. After trying pretty much all of them I’ve settled on the Conceptis version as the best. After getting used to the interface, it works almost as well as Primo Kakuro. My only complaint is that it doesn’t allow you to use different colors for the pencilled-in numbers. Without this feature, the “Very Hard” puzzles are nearly impossible to complete without guessing, which kind of defeats the object of the game. Other than that, it’s an excellent substitute. And they seem to be adding more puzzle packs constantly, so hopefully we can enjoy it for a long time to come.

Happylonelyguy ,

Could a five star

I reserve five stars for knock your socks off perfection. Thank you to the developer of this game for allowing the essence of this wonderful game to come through. Occasionally, during a “very hard” version I feel like I have to take a guess, so it’s still teaching me about possible combinations and how to think outside the box.
I love the immediate feedback when I’ve completing a row or line incorrectly. Also, the ability to see possible combinations and reducing the options as I fill in part of the solution. However, sometimes when I tap on the clue it shows me the row when I tried to select the column or vice versa. I thought it just might be that my fingers are too wide and I’ve tapped incorrectly, but it’s happened even when I’ve carefully tapped with a pinky, and doesn’t happen when im selecting a box. First world problem which is resolved by tapping the cue a second time.

App Privacy

The developer, Conceptis Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

More By This Developer

You May Also Like