Killer Sudoku - Puzzle Games 4+

Brain Games and Logic Puzzles

Guru Smart Holding Limited

Designed for iPad

    • 4.8 • 4.4K Ratings
    • Free
    • Offers In-App Purchases



Enjoy the excellent Killer Sudoku puzzle game for both beginners and advanced Sudoku lovers! Download and start the daily challenge now!

Thousands of killer sudoku puzzles here for you to solve. Come to play this new killer sudoku game, and train your brain. Have fun!

[New] Dark Theme is available now! Perfect for you to play Killer Sudoku before bed.
[New] Color Theme. Playing games could be colorful!
[New] Casual Mode. 4*4 and 6*6 boards bring you more fun!

Killer Sudoku is a logical puzzle number game & brain game. To complete a puzzle, like the classic sudoku game, you can fill the grid with numbers; unlike the classic sudoku puzzle, you have to make sure that the sum of numbers in each cage (areas surrounded by the dotted lines) is equal to the number in the upper left corner of the cage.

If you are interested in playing number games or math puzzle games, this Killer Sudoku is exactly for you! If you'd ever played number games, such as Sumdoku, Addoku or Cross sum, come to try this one, too! It is an amazing combination of a sudoku puzzle, a KenKen and a Kakuro puzzle game.

Killer Sudoku may be a little bit harder than a classic sudoku puzzle game, no worries! We offer several balanced difficulty levels for beginners and advanced players! The game has the function to add or remove notes during gameplay. Did you make a mistake at the beginning? No worries, there are undo and hint functions! Get it back fast!

How to play:

1. Place numbers 1-9 into each grid cell exactly like in a classic Sudoku puzzle;
2. Different cages - groups of grid cells indicated by dotted lines;
3. The sum of all numbers in each cage should be equal to the number in the upper left corner;
4. The sum of all numbers of each 3x3 block, row, or column always equals 45;
5. Each cage, row, column, or 3x3 block cannot have the repeated numbers.


- Turn on the note mode to take notes like solving puzzles on a piece of paper. The memo is automatically updated while you fill in the cell.
- Find your mistakes and challenge yourself or use auto-check to see your mistakes in real-time.
- Complete daily challenges and earn special trophies!
- Use free hints when you are stuck.
- Thousands of killer sudoku puzzle games

More functions and highlights:

- Statistics. Track your killer sudoku progress.
- Unlimited Undo. One tap to remove the mistake.
- Autosave. If you leave Sudoku incomplete, it will be saved. Keep playing anytime.
- Eraser. Eliminate all of the mistakes if you made any.
- Sharing functions. You can share this sudoku game with your friends via Facebook, Twitter, etc.
- Four perfectly balanced difficulty levels: Easy, Medium, Hard, and Expert.

Train your brain anytime and anywhere and keep your mind sharp in this Killer Sudoku puzzle game. With its easy control, intuitive interface, and perfect selection of different levels, this killer sudoku app will help you to enhance your logical ability and learn more Sudoku skills. Come and try it out! Challenge yourself how quickly you can solve problems and improve your memory!

We always carefully check all reviews. Please feel free to leave your ideas, feedback, suggestions, or any questions about Killer Sudoku for further improvements! We are always here for you. Thank you and have fun with Killer Sudoku, Sudoku Puzzle!

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What’s New

Version 2.6.0

Dear killer sudoku players,
This update includes bug fixes and performance improvements.
Share the game with your friends, and thank you for choosing our killer sudoku game!

Ratings and Reviews

4.8 out of 5
4.4K Ratings

4.4K Ratings

ArkyOwl ,

Loses games

Not always, but frequently the app loses your game if you stop to take a phone call or look at something else. I was almost finished with the daily expert puzzle this morning that I’d spent over 45 minutes on when I got a phone call. When I went back to the app I was presented with the same puzzle, totally blank. Aggravating. I certainly wasn’t going to start all over again.

Developer Response ,

Hi, we are very sorry for such inconvenience. We will continue to update our game to make it better and better. You can reach us at with any other feedback. Thank you very much for your kind support! :-) - Sarah

Dancinut ,

Needs a couple things to be 5 stars

First, great game! The ‘hard’ levels are actually hard and challenging, which is perfect for waking up with my morning cup of coffee. And the ads between games are short which allows you to play on fairly quickly.
2 requests to make this a 5 star game. First please give the game a landscape orientation option. When I’m traveling this would allow me to set my iPad on a tray table and enjoy the game instead of holding it in my hand all the time.
Second, please please please stop accepting banner ads that have movement! I don’t mind a banner ad at the bottom of my screen while I play, but lately there is a slots game you’re allowing to advertise and it demo rolls the slots every 2-3 seconds. The constant movement is incredibly distracting and causes my timed games to be much slower! Please make your banner ads static images.
Those 2 things and thus becomes the absolute best version of killer sudoku in the App Store!

Developer Response ,

Hi, thank you very much for your kind support and feedback! We will continue to update our game to make it better and better. You can reach us at with any other feedback. Thanks again! :-) - Sarah

MMG20906 ,

Notes are changed

I enjoy the game but there is a problem with the advanced notes feature. If I return to a partially completed game, the notes will not be the same as when I left. There will be numbers there that I had previously deleted.

Same with getting a hint. I once made the mistake of getting one and it completely filled on all of the numbers on the notes wiping out the progress I had made.

I have taken to photographing what the board looks like when I leave so I can return it to that state when I resume the game. There has to be a better way.

Developer Response ,

Hi, sorry about this issue. Could you please kindly take a screen recording or a video regarding the whole process of the issue, and send it to It would be very helpful for us to locate the issue and make the game right for you. Thank you very much for the support! :-) - Sarah

App Privacy

The developer, Guru Smart Holding Limited, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Purchases
  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Purchases
  • Identifiers
  • Usage Data
  • Diagnostics
  • Other Data

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

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