Killer Sudoku - Puzzle Games in IOS

Brain Games and Logic Puzzles

Walkthrough, Guilds, Tips on this special game

Our Site Score

85/100

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.

Reviewed on: Thu Feb 26 2026
Dinsun Avatar

Dinsun Review

If you find regular Sudoku too easy, Killer Sudoku will give you the kick in the teeth you’re looking for. It’s a purely logical exercise that demands a good grasp of arithmetic and spatial reasoning. The app itself is clean and functional, which is all you really need for a board game adaptation. I appreciate the lack of flashy gimmicks—it’s just the grid and your brain. However, it’s not exactly 'fun' in the traditional sense; it’s a workout for your prefrontal cortex. The difficulty curve is steady, and the 'hint' system is helpful without being overbearing. It’s a very safe, very conservative implementation of a classic puzzle. If you like numbers, you’ll like this. If you don’t, this will feel like a second job. It’s well-made, but fundamentally dry.

Overall Stats

Pros & Cons

  • Clean UI
  • Massive amount of content
  • Actually challenging logic puzzles
  • Visually boring
  • Can feel like tedious homework
  • Occasional intrusive ads in the free version

Technical Report

Performance: Perfect performance; works offline.

Accessibility:
  • Difficulty Presets

Audience Fit

Buy if: You are a logic puzzle fanatic who wants a serious mental challenge.

Skip if: You find math and grids to be the opposite of entertainment.

Similar Games:
  • Sudoku.com
  • Nonogram.com

Reviewer Context

  • Reviewer: Dinsun, 40-year-old expert gamer
  • Hardware: iPhone 15 Pro
  • Playtime: 15 hours
  • Status: Mastered Expert levels

The Game

Available on: iPhone, iPad, iPod

Version 3.11.0Wed 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!


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.

Features:

- 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!

Privacy policy: https://killer-sudoku.gurugame.ai/policy.html

Terms of use: https://killer-sudoku.gurugame.ai/termsofservice.html


Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.

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.

Features:

- 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!

Privacy policy: https://killer-sudoku.gurugame.ai/policy.html

Terms of use: https://killer-sudoku.gurugame.ai/termsofservice.html


In-Game Events

Brain Game Quest with Puppies!
SPECIAL EVENT
Brain Game Quest with Puppies!
30 new camping-themed logic puzzles & math games!

Puppies are ready - show your skills! Clear every puzzle, earn exclusive medals, and enjoy a cheerful camping journey!

Starts: 4/10/2026Ends: 4/21/2026

Ratings & Reviews

4.8 out of 5 with 5823 Counts
Age Rating 4+

Screenshots

Killer Sudoku - Puzzle Games screenshot 1Killer Sudoku - Puzzle Games screenshot 2Killer Sudoku - Puzzle Games screenshot 3Killer Sudoku - Puzzle Games screenshot 4Killer Sudoku - Puzzle Games screenshot 5Killer Sudoku - Puzzle Games screenshot 6Killer Sudoku - Puzzle Games screenshot 7Killer Sudoku - Puzzle Games screenshot 8Killer Sudoku - Puzzle Games screenshot 9Killer Sudoku - Puzzle Games screenshot 10Killer Sudoku - Puzzle Games screenshot 11Killer Sudoku - Puzzle Games screenshot 12Killer Sudoku - Puzzle Games screenshot 13Killer Sudoku - Puzzle Games screenshot 14Killer Sudoku - Puzzle Games screenshot 15Killer Sudoku - Puzzle Games screenshot 16Killer Sudoku - Puzzle Games screenshot 17Killer Sudoku - Puzzle Games screenshot 18Killer Sudoku - Puzzle Games screenshot 19Killer Sudoku - Puzzle Games screenshot 20

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.

Features

1

Thousands of hand-crafted levels

2

Daily challenges and seasonal events

3

Helpful note-taking and hint tools

4

No-pressure, relaxing game design

Tips

Promotion Videos

How to set a Killer Sudoku | Setting the Sudoku #1 - YouTube

News on this game

Killer Sudoku - Puzzle Games by Guru Smart Holding Limited

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.

AppAdvice - Tue Jul 29 2025

Killer Sudoku by Sudoku.com by Easybrain

Enjoy 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 Limited

Enjoy 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 Games

Sudoku Free Puzzle Game is a welcomed and addictive Brain Sudoku puzzle game on App Store.

AppAdvice - Tue Jun 29 2021

Gameplays

Q&A

It requires an extra layer of math, but many players find the cage clues actually make it more interesting to solve.

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