Killer Sudoku is a fun and challenging variant of Sudoku. If you love Sudoku, why not give Killer Sudoku a try?

As with Sudoku, the objective of Killer Sudoku is to fill the grid with the numbers 1 to 9 such that each row, column and nonet (3x3 group of cells) contains each number only once. In addition, a Killer Sudoku grid is divided into cages, shown with dashed lines. The top-left corner of each cage shows the sum of the numbers within it. The same number cannot appear more than once in a cage.

There are ten puzzles included for free, and thousands available for download. The puzzles are graded into difficulty levels, all excellent quality and with a unique solution.

The app and puzzles are from the maker of

What’s New

Version 1.5.3

Fixes a bug that can prevent puzzles from being downloaded.

Ratings and Reviews

4.8 out of 5
556 Ratings

556 Ratings

JessTPF ,

Doodle option

I have been using this app for years now, and I love it. The only thing I think would improve it would be the option of being able to doodle around the edge of the grid so that you could record your workings/sums to refer back to. I always do this on a paper and pen version, and find it helpful,

Fjrjfek ,

Uncomfortable controls

I might be just picky, but controls are confusing and makes solving time longer only because of poor pencil functionality. Would be so much better if pencils and final number pads would be divided in 2 different pads but not activated by 1 button. Also would make it easier to input final number without brain breaking deselecting opposite variant while you thinking about the correct. Controls just makes unnecessary hustle that just adds up to the time making overall experience bit bad. All the rest is great.

Neporhuec ,


I enjoy the problems, however, I do find that problems, which are supposed to be of similar difficulty, can take from as little as 30 minutes to over 1.5 hours, some never being finished but abandoned.

App Privacy

The developer, James Gibbs, 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 Collected

The developer does not collect any data from this app.

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


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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