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

Enhancements and bug fixes in this version:

- Updates to support iPhone 11 and iOS 13
- Enhancements to multi-cell editing - if multiple cells would gain the same final answer, add it as a pencil mark/note instead
- If a cell contains a single number with an underline or question mark, show the "pencil mark" button instead of the "cancel" button
- Updates to usage tips

Ratings and Reviews

4.8 out of 5
164 Ratings

164 Ratings

Why does this nickname have to be unique, anyway? ,

Very well designed

I’m sort of addicted to this app. Killer Sudoku is a pretty complicated game, requiring the player to keep track of many possibilities. This app provides a lot of useful aids. For each cage, the app provides all the sets of numbers that are possible for it, and you can uncheck sets as you eliminate them as possibilities as you go along. You can, of course, enter “possible numbers” as notes in each square, or across a selection of squares. You can select more than one cage and the app will automatically tell you the sum of all its squares. There’s also a “calculator” that allows you to enter an arbitrary cage size, and it tells you all the possible combinations. There aren’t very many killer sudoku apps on the App Store (I know of two for certain), but this is easily the best one. It offers many sets of puzzles as in-app purchases, in a wide range of difficulties; since the harder puzzles have lots of replay value (unless you have perfect memory, I suppose), then a few of these purchases will last you a long time.

Missie_in_maine ,

Good game

Been playing for a while now. Game would benefit from someway to denote all the squares of a number have been placed

Shoofy100 ,

Great Value but......

Easy to use app and lots of puzzle pack options for a fair price. However there are a handful of puzzles that do not have a unique solution.
Frustrating enough to drop a star from the rating.


James Gibbs
2.4 MB

Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. 100 Easy Killer Sudokus #1 $0.99
  2. 100 Moderate Killer Sudokus #1 $0.99
  3. 100 Mixed Killer Sudokus #1 $0.99


  • Family Sharing

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

You May Also Like