Kakuro: Number Crossword 4+

Cross sum challenges

Conceptis Ltd.

    • 4.8 • 722 Ratings
    • Free
    • Offers In-App Purchases



Fill empty squares so each block sums up to the number on its left or on its top. 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.

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.

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


• Unlimited check puzzle
• Show errors during gameplay
• Unlimited Undo and Redo
• Pencilmarks feature for solving hard puzzles
• Autofill pencilmarks mode
• Show Sum Combinations feature
• Show Sum Remainder feature
• Concurrently playing and saving multiple puzzles
• Puzzle library sorting and hiding options
• Graphic previews showing puzzles progress as they are being solved
• Enlarge, reduce, move puzzle for easy viewing
• Portrait and landscape screen support (iPad only)
• 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 2.5

This version improves performance and stability.

Ratings and Reviews

4.8 out of 5
722 Ratings

722 Ratings

hnkahl ,

Best version of a great puzzle game

First, Kakuro is a great puzzle game, much more fun than Sudoku in my opinion. Second, Conceptis has combined quality puzzles, accurately graded for difficulty with a flawless user interface and a never ending supply of new puzzles to produce the best Kakuro app available.

Conceptis began publishing great Kakuro books in 2006 and with this app has continued with the same quality and grading system. Once you develop some skill, this game is very entertaining and you can easily get hooked and waste an incredible amount of time. Highly recommended. 5 stars

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 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

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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