Killer Sudoku

Contains adsIn-app purchases
4.2
240 reviews
10K+
Downloads
Content rating
Everyone
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About this game

The king of sudokus, perfect for brain training!

Killer Sudoku (aka Sumdoku / Mathdoku) is a Sudoku variant where cells are grouped into cages and the sums of the values in each cage are given. Once you know Killer, you will never go back to Classic again...

The app includes lots of cute little 4x4 and 6x6 puzzles, perfect for beginners, with contextual hints to help you learn Killer techniques interactively. From there you graduate to 23 levels of chunky 8x8 and full-size 9x9 puzzles, guaranteed to stretch any brain. Are you one of the very few who can conquer 9x9 level 15???

The app has everything you could wish for: gazillions of puzzles at all sizes and levels, automatic notes, drag copy & repeat entries, sum calculator, cage summer, progress validator, and hints.
Updated on
Feb 5, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
4.2
240 reviews
Sharon Maram
January 12, 2021
Very good app. Took a bit of time to get used to it, but you can make notes, sum cages and get the combinations that make up the cages. I don't like that you have limited times to do verifications or you will need to pay for more. It would also be nice if it cleaned up the notes, taking out options that are no longer possible bc you entered the number in the same row etc. This would speed up the tedious part of the puzzles. It would also be nice if you could select multiple cells to make notes
3 people found this review helpful
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sutts101
January 14, 2021
Hi Sharon, glad you like it. You can watch a reward video to top up validations if you do not want to buy ad-free. Also, check out "drag copy" (to copy entries and notes) and "long press" (to set a value and remove others). Kind regards, Ian
Jean Thompson
June 25, 2020
My favourite type of Sudoku. Nice clean layout and very welcome absence of ads. I love not having to juggle between two grids for actuals and pencil marks. The all in one grid is much less error prone. One small criticism for which I've deducted a star. The cage outlines and numbers in pale green are quite hard to see on the small screen of a phone. Nothing wrong with black as in most newspaper puzzles, or maybe dark blue.
5 people found this review helpful
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Nathan DTS
September 21, 2020
The input methods feel a little unnatural, but you get used to it. The inability to redo puzzles is very annoying; presumably this is to prompt the purchase additional puzzles, but it would be nice to see how well I could do some of the earlier puzzles now that I'm familiar with some tricks.
1 person found this review helpful
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What's new

Landscape mode