Killer Sudoku - Puzzle Games
Brain Games and Logic Puzzles
Ratings
Age
4+
Category
Puzzle
Languages
English
Wed Nov 12 2025
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!
Killer Sudoku is a popular mathematical logic puzzle from the makers of the most downloaded Sudoku apps. While it uses the same 9x9 grid as classic Sudoku, it introduces 'cages' with specific sums. You must fill the grid ensuring each row, column, and 3x3 block has numbers 1-9, while also ensuring the numbers in each cage add up to the indicated total. It’s an excellent way to train your brain, improve your math skills, and enjoy a meditative puzzle experience.
Dinsun Expert Review
Our Expert Score
Killer Sudoku is the perfect step-up for those who find standard Sudoku a bit too predictable. By combining traditional Sudoku rules with the 'sum-matching' of KenKen, it introduces a whole new dimension of logical deduction. You aren't just looking for missing numbers; you're doing mental arithmetic to ensure each 'cage' hits its target total. This app by Easybrain is arguably the best implementation of the format on mobile.
The UI is clean, responsive, and includes essential features like Snyder notation and mistake-checking. What I appreciate most is the 'Daily Challenge' and themed 'Seasons,' which provide a consistent reason to log in every day. The difficulty tiers are well-defined, allowing beginners to learn the 'cage' logic at their own pace before tackling the absolute monsters in the expert level. It’s a smart, polished, and incredibly addictive brain-trainer.
Features
Thousands of hand-crafted levels
Daily challenges and seasonal events
Helpful note-taking and hint tools
No-pressure, relaxing game design
Tips & Walkthrough
Every 3x3 block, row, and column in Sudoku must sum to 45. In Killer Sudoku, you can subtract the known cage sums from 45 to determine exactly which number must be in an 'outie' cell (a cell that sticks out of a block's cage boundaries).
Gameplays
Look for small cages with high sums. For example, a 2-cell cage that sums to 17 MUST be 8 and 9. Marking these 'certainties' immediately limits the possibilities for the rest of the 3x3 block.
Screenshot
Q&A
It requires an extra layer of math, but many players find the cage clues actually make it more interesting to solve.
Ratings & Reviews
Loses games
Tue Feb 01 2022 ArkyOwlNot 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.
Needs a couple things to be 5 stars
Fri Mar 25 2022 DancinutFirst, 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!
Notes are changed
Tue May 02 2023 MMG20906I 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.
Progress getting erased?
Thu Apr 07 2022 AziendeI really enjoy this game and don’t usually have problems. Recently the game has been erasing my progress on the 6 x 6 Hard. I’m on level 500 and the games has began erasing my completion on the first levels. Even when I redo the levels it won’t say I’ve completed it still, and at first it was only levels 1-2, but now it’s says I haven’t completed levels 1-7. It’s a little annoying as well as the game randomly opening the App Store repeatedly with different apps to download when I don’t click on ads. Other than that it’s an enjoyable game.
Greedy Greedy Greedy Subscription
Wed Dec 27 2023 Drew982647I have been playing this game almost daily for over two years now. I have been thinking about going ad free but since it was $15 (for forever) I held off. Recently, every single time you pause the game or check another app/text you have to watch an ad to resume (no matter for how long it was paused). I opened the app today and decided to treat myself because the ads were so annoying and there is only a subscription ad-free option. I am not paying $2.99 a month for freaking sudoku ad free. This is greedy and I am finding a new app to use that doesn’t take advantage of their users. Not everything should be a subscription.
Glitches ruining experience
Sun Feb 13 2022 Andrew James BoettoAlong with the issues of having to play a puzzle more than once or losing your progress like is mentioned in other reviews, there is an issue where the screen freezes on a puzzle and locks your phone completely. It’s always happens when I’m listening to something with airpods, and the sound continues but the screen is locked and won’t turn off or even let you power cycle to restart your phone. Eventually it will power cycle on its own to restart, but until then your phone is useless and you can’t pause or stop the audio you’re playing.
Cross Number Math!
Thu Apr 27 2023 Maggie104For a bonus, you’ll get 10,000 puzzles to solve where assorted numbers, math symbols, and blank squares appear. At the bottom of each puzzle you get numbers and symbols left out and are disguised as game tiles. Put each tile in the correct place until all tiles are colored green with a final solving time. Wrong numbers will turn red. When the puzzle is solved, the next puzzle will adjust into activity.
Frustrating
Sat Jun 18 2022 Skim8I love the game and have no complaints about actual gameplay; however, the app itself wreaks havoc on my phone. Anytime it’s open, my phone starts to freeze. Every single time. The ads are incredibly annoying. I have to sit through several ads at various times throughout a game, before every game, and after every game. $15 to remove ads is a ridiculous price to play a game that’s free online with no ads. With the hassle of phone issues and a crazy number of ads, it’s just not worth it. There are better options out there.
Some Youtube Videos found!
News found!
Killer Sudoku - Puzzle Games by Guru Smart Holding LimitedKiller 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.
AppAdvice Tue Jul 29 2025
Killer Sudoku by Sudoku.com by EasybrainEnjoy an engaging Killer Sudoku experience! Jump into enhanced gameplay, solve tons of puzzles, train your brain, and have fun!
AppAdvice Wed Jan 29 2025
Sudoku Puzzle - Brain Games by Guru Smart Holding LimitedEnjoy the Free Sudoku Puzzle Game, Brain Games for people who are a fresh start and advanced.
AppAdvice Sun Sep 29 2024
Killer Sudoku - Brain Games by Oakever GamesSudoku Free Puzzle Game is a welcomed and addictive Brain Sudoku puzzle game on App Store.
AppAdvice Tue Jun 29 2021
