⋆Sudoku 4+

Classic Sudoku Logic Puzzles

Brainium Studios LLC

    • 4.8 • 157.3K Ratings
    • Free
    • Offers In-App Purchases



Sudoku by Brainium has updated the classic Sudoku puzzle game you know and love, with a clean, modern design, calming backdrops, and intuitive controls. With endless number puzzles and five levels of difficulty, our Sudoku is perfect for players of all skill levels. Whether you’re in the mood for a quick game to help you relax, or an expert level logic challenge to train your brain, there’s a board for you.

Brainium Sudoku also features the first and best smart hint system available. It goes beyond simply giving you the answers. Instead, it helps you learn and improve your skills by teaching you “why” the answer is what it is.

With every puzzle, our “Hint” button provides the techniques you need to make progress even when it seems like your path is blocked. The instructions are easy to understand, unique for every puzzle, and presented with easy to follow, helpful animations and colorful visuals. This feature will improve your Sudoku skills whether you’re a first-time player or a seasoned expert. It’s the perfect companion for anyone looking to take their number game or logic puzzle skills to the next level.

Enjoy a clear, easy to read, and customizable Sudoku board with visual guides that make reading the board and figuring out where to place your next numbers a

Our input system is designed to make entering numbers and notes simple, and our user-friendly scoring system makes it easy to compete with yourself or friends.

Starting and keeping a daily habit of mental exercise is easy by playing Sudoku’s Daily Puzzles, which are sure to keep your mind sharp and at ease. Track your progress with onboard statistics and unlock fun achievements along the way.

Brainium’s Classic Sudoku Features:

• The world’s most advanced Sudoku learning tool and hint system
• Hints that teach you the logic behind the answer
• Five perfectly balanced difficulty levels from beginner to expert
• Daily Puzzle Challenges - complete them to earn points and gold checkmarks
• Two beautiful grid styles
• Nine relaxing backdrops
• Light or dark grid fonts with adjustable size
• Auto Light/Dark mode adjusts the theme based on your device settings
• Unlimited collection of brain training logic puzzles
• Game Statistics to track progress
• Auto-Fill Notes option
• Auto-Clear Notes option
• Auto-Check Errors option
• Number Painting option allows you to rapidly fill open squares with a selected number or note
• Universal App looks great on iPhone and iPad
• Global and friend leader boards
• Portrait and landscape play options
• Right or left-handed option in landscape
• iPad keyboard compatible

We hope Sudoku by Brainium brings you endless fun, relaxation, and a challenge for your mind.

More Fun & Free Logic and Classic Card Games from Brainium:

• Solitaire
• Mahjong
• Spider Solitaire
• FreeCell
• Pyramid
• Blackjack

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What’s New

Version 3.0.12

We'd like to thank our players, you make our games possible!
- Bug fixes and improvements

Ratings and Reviews

4.8 out of 5
157.3K Ratings

157.3K Ratings

The Screener ,

Playing it for 65years

When I was 24, I went to Tokyo to buy artificial flowers and Christmas tree lights! Walking along the “Ginza”, I stopped to have a drink at a street bar, and saw people playing a game I never saw before! It was Sudoku and as I watched I noticed it was played with much skill and with no emotions! Japanese people never show emotion in public, but their skill was unbelievable and I wanted to learn! All being very polite, I asked how to play and to my surprise, an older man giggled and asked me to with him! Slowly not talking as I couldn’t understand him nor him me, he showed me the technique pointing his finger as if I were playing! Starting in rows then columns, back and forth until I saw a pattern, and then he started another game and as he played he would point to me the a number and then ask me to hit that number wherever I saw it! Slowly I saw the pattern and although I really didn’t learn at that meeting, I thank him bowing and bowing!

Developer Response ,

Thanks for playing this Sudoku, and sharing this story with us, Screener!

ArtsyAxolotl ,

Simple, relaxing, easy

Of all the versions of Sudoku I’ve tried, this one is my favorite. A lot of the others have intrusive noises when you make mistakes or music. This app is very calming, doesn’t show the timer unless you want to see it, and gives you a very gentle red number if you place something wrong (which you can turn off entirely also). I don’t feel badly for making mistakes in this app. I find the game easy to control and even the markups are easy to do. This is also the perfect example of well placed ads in a mobile game. They’re entirely non intrusive, only playing when you start a new game and don’t auto play sound. I don’t mind watching the ads at all. Great version of a classic game! Keep it up!

Update: Recently the style of the game updated and I don’t like it as much. The previous graphics looked better and more relaxing IMO. I wish there was an option to switch it back, like a “classic” or something. One of the things I really liked about this version of sudoku was that you could always see what numbers were fully discovered, even if you had a tile selected. Now you have to unselect a tile to see which numbers are still in play.

A bit disappointing since this was far and away the best sudoku app IMO. Now it’s just eh like the rest.

Developer Response ,

Hi ArtsyAxolotl, we value your feedback and reintroduced the classic Sudoku board in our latest update to the game which can be found here: https://apps.apple.com/us/app/sudoku/id418044512. We hope this update brings you a better playing experience!

Nivella ,

Best sudoku app I’ve ever seen, with a tiny quibble

I love the features here, like the number paint tool and the auto fill so I can get right into the meat of the puzzle, and I love how the hints are educational about the puzzle theory, instead of just telling me what goes in that square. I appreciate that the ad plays before the puzzle instead of part way through breaking my concentration, or after the puzzle and downing the happiness of solving it. I also like that the majority of the ads either have no sound, or are muted by default. I love this app so much!!

The only issue I have is what I think is just a bug, where on my iphone 6, I can’t access the leaderboard, but I can see it just fine on my ipad. When I click the scores button, it just flashes the animation, but doesn’t actually take me to the screen. Since I mostly do this from my phone, it’s kinda disappointing, so I would love if that was fixed sometime.

App Privacy

The developer, Brainium Studios LLC, 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:

  • Location
  • Usage Data
  • Other Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Usage Data
  • Other Data

Data Not Linked to You

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

  • User Content
  • Diagnostics

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


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