Killer Sudoku by Sudoku.com

Contains adsIn-app purchases
4.5
149K reviews
10M+
Downloads
Content rating
Everyone
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About this game

Killer Sudoku will let you enjoy an exciting experience! Jump into the new Sudoku gameplay, solve tons of new challenging number puzzles, and train your brain! Install Killer Sudoku now for free!

This free Killer Sudoku app comes from the developer of the world’s most downloaded classic Sudoku puzzle – Sudoku.com. So a stellar experience, extra game quality, and endless fun are guaranteed.

Whether you’re a fan of classic Sudoku or just looking for a number game or math puzzle for a great time and mental workout, free Killer Sudoku is here for you.

Although Killer Sudoku seems a bit harder than classic Sudoku, we made it accessible for players of all skill levels. This number puzzle game comes with several difficulty levels – easy, medium, hard, and expert Killer Sudoku. This way, Killer Sudoku puzzles are great for both beginners and advanced Sudoku solvers. We have no doubt you’ll become a Killer Sudoku master in no time!

What is Killer Sudoku

Killer Sudoku is a true legend among number games and puzzles. In a nutshell, it’s a perfect blend of those fave brain-twisters Sudoku and Kakuro. Absolutely free!

This number puzzle goes by many names: Sumdoku, Addoku, Cross Sum, etc., but the rules are equally simple across the board. Your goal is to fill the grid with numbers like in classic Sudoku while making sure the sum of numbers in the cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage. Still sounds complicated? Let’s review the Killer Sudoku rules in detail.

How to play Killer Sudoku

✓ Fill all rows, columns, and 3x3 blocks with numbers 1-9 exactly like in classic Sudoku
✓ Pay attention to the cages – groups of cells indicated by dotted lines.
✓ Make sure the sum of numbers in each cage is equal to the number in the upper left corner of the cage.
✓ The basic rule of Killer Sudoku is that the sum of all numbers in each 3x3 block, row, or column always equals 45.
✓ Numbers cannot repeat within cages, a single row, column, or 3x3 region.

Killer Sudoku features

✓ Complete free Killer Sudoku Daily Challenges to compete for awards
✓ Take part in Seasonal Killer Sudoku Events and win unique medals
✓ Challenge your logic figuring out where you went wrong, or enable Auto-Check to see your mistakes
✓ Add notes if you’re not sure which number to place. Enjoy the experience of the classic paper-and-pen puzzle games.
✓ Use hints when stuck on a really hard number puzzle. Don’t bother if you’re an experienced Killer Sudoku solver.

More Killer Sudoku features

- Statistics. Track your daily Killer Sudoku progress, best time, and other achievements
- Unlimited Undo. Made a mistake? No worries, undo it in one tap
- Color themes. Select classic Light, Dark, or Sepia themes to design your own Killer Sudoku kingdom!
- Auto-save. If you get distracted and quit your Killer Sudoku game unfinished, we’ll save it for you so you can continue anytime.
- Eraser. Erase any mistakes you made in a number puzzle.

Killer Sudoku is now available on the vast majority of phones and tablets. Install Killer Sudoku for free, train your brain, and have fun along the way!
Updated on
Dec 15, 2022

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.
This app may share these data types with third parties
Location, Financial info and 3 others
This app may collect these data types
Location, Financial info and 3 others
Data is encrypted in transit
You can request that data be deleted
4.5
149K reviews
Eric Hsu
January 4, 2023
Having ads pop up in the middle of a puzzle game is messed up. Otherwise this would've been a 5 star review. Having ads before and after games are perfectly fine to generate revenue for the game. It's having ads that interrupts your chain of thought that's a terrible idea. Update: it got worse somehow. I got an ad upon opening the game and another ad starting the daily puzzle. 2 ads before I even get to play is over the line. I'm uninstalling this garbage
36 people found this review helpful
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Easybrain
December 4, 2022
Hello! We apologize for any inconvenience caused. It was never our intention to upset you. Thanks to ads, millions of users can enjoy playing Sudoku every day. You can disable all ads for a small one-time fee in Settings. There will never be any ads again.
Lauren Kramer Bauer
December 16, 2022
As many other users have said, the in-game ads are the worst. I get it, especially as a small business owner, but actually suspending play to show them is obnoxious. 4 other issues: The new color scheme is not eye friendly, please allow us to change and customize our play place. Second, I miss the autocomplete setting. Why did that go away? I really wish you had a sign-in and backup. I got a new phone and I full year of progress. It's now easier and no longer challenging. Going elsewhere
50 people found this review helpful
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Easybrain
December 16, 2022
Hi! Thanks to ads, millions of users can enjoy playing Sudoku daily. You can disable all ads for a small one-time fee in Settings. Right now, we don't have these features available. We'll keep your suggestion in mind. Concerning the autocomplete option, it is still being tested. After successful testing, we hope it will be implemented in the app.
Thomas Keys
December 21, 2022
I have raised my rating. The UI is much improved, and no hangs are occuring. The play is much more enjoyable. I paid for no ads. I still find a couple of annoyances. The clock starts on the challenges before you open the puzzle. I have no way passing a given puzzle to someone else using this program.
2 people found this review helpful
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Easybrain
December 22, 2022
Hello Thomas! Thanks for your reply. Please contact us via the "Help" section in the app, We look forward to your reply.

What's new

We hope you enjoy playing Killer Sudoku. We read all your reviews carefully to make the game even better for you. Please leave us some feedback why you love this game and what you'd like to improve. Keep your mind active with Killer Sudoku!