Last updated on February 4th, 2026 at 12:41 am
Sudoku – Strategy Game Review
Sudoku is a Strategy/Puzzle game from Red Key Software Corporation, first launched in 12th February 2019.
It’s rated 4+ and currently has 565+ ratings on the App Store.
What Makes Sudoku Stand Out
Join over 21,000,000 of our fans and download one of our Sudoku games today!
Makers of the Best Sudoku Game of 2008, Sudoku (Free), we offer you the best selling Sudoku game for iPhone with great features and 1000 unique puzzles!
Sudoku will give you many hours of fun and puzzle solving. Enjoy the challenge of solving Sudoku puzzles whenever or wherever you are using your iPhone or iPod Touch.
OPTIONS
All options are on by default, but you can turn them off in the Options menu
• Show Incorrect :: Shows incorrect answers in red.
• Smart Buttons :: Disables the number button when that number is completed on the game board.
• Smart Notes :: Removes the number from the notes in the box, column, and row that contains the cell with your correct answer.
FEATURES
• 1000 unique handcrafted puzzles
• ALL puzzles solvable WITHOUT guessing
• Four different skill levels
• Challenge a friend
• Multiple color schemes
• "ALL notes": tap the "All notes" button on to show all the possible answers for each square. Tap the "All notes" button off to remove the notes.
• Hints: shows the answer for the selected square or a random square when one is not selected
• Pause the game at any time and resume where you left off
• Best times, progress statistics, and much more
Do you want more? Try one of our other versions of sudoku which have all the same great features!
- Try Color Sudoku for a fun twist to solving sudoku puzzles.
- For advanced puzzle solving, try Expert Sudoku to challenge your sudoku solving skills.
This Strategy game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Sudoku is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 3rd December 2020
Recent improvements include:
Bug fixes and performance improvements.
Download & Availability
Sudoku is available through the official App Store for iOS devices.
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
We've had this app for such a long time. We love it.
This is a great game. You can choose a level. It times you, but never buzzes out of time. Its just for you. Every time we get a new phone, we look for this Sudoku app.
4 levels. Straight forward game play with a notes option and color background choices. No distractions and all the features necessary for game play. Great Sudoku game.
We had the LTE version which we have played for years but decided to upgrade to the paid app. Same app just more puzzles and colors available which is a very nice feature. This is, by far, our favorite app for Sudoku so much so that it is the only one we play on all our app devices. Ive tried other ones but always remove them and come back to this one.
Been playing it for years. 1000 distinct beginning grids, 250 at each of four levels of difficulty. After doing all of them, we reset stats and start all over. Will never run out of grids.
Lets you take hints when you are stuck.
No bells and whistles. No information overload. Just straight sudoku.
Can't think of any improvement to make. Rock solid.
5 stars all around. Had it for decades.
This sudoku is the best Ive found. It has a simple clean look and is a fun way to pass the time. Its our go to game on our phone.
Every night we play a few games to settle our mind before we go to sleep. It has also helped to pass the time when we have to wait on an outcome, such as picking up a child at school waiting for dismissal. Its one of our favorites. Thank you.
Perfect game. The various levels of difficulty are great for when we're feeling like just a quick break or a longer actual challenge. The notes work very well and are easy to use – just like our pencil notes on paper. No ads! Just exactly what we need, a basic sudoku game at its finest.
We have tried others but this one is the best.
A great group of down time occupiers.
Great for early morning wake-up.
The game is customizable in all the right ways. The board scales to and is readable on any screen size. Data entry is rapid, but please add the ability to enter a value into a square with a simple double tap when there is just one possible value for that square.
Just an amazing game, wow the best.
Doesnt have a bunch of gimmicks or ads or fillers that most games have. This is just the game. Appropriate levels. Just sudoku.
We love this app, it keeps our brain working and entertained while we commute to work.
Challenging as you want to make it, stimulating and a little addictive.
Love the app. Worth every penny.
Simple. Well laid out. Good for the brain. :).
We are addicted to sudoku. It's great having it on our phone instead of carrying a book and pencil.
We love this game, especially the different levels. Free version is great but if you pay you get a lot more.
Challenging puzzles. Great features. Addictive.
We enjoy this game very much. Only g pie we can have is, we want to buy the upgraded version but the link through the phone just gives us the spinning wheel.
Great to interface and implementation of the classic game.
Ive enjoying this app for years. We made it through all of the puzzles and now Im starting them once again.
We dont want complicated games that dont relax us. We love the simple straightforward brown icon version that doesnt require major strategy or adrenaline to use/play. Theres no garish colors or dancing figures or blaring music. Get this if you want a simple, relaxing time out.
Ive reviewed this game several times, but it seems to be about as good as it can be. In fact, it may be the best Sudoku app available. The interface is perfect, the games challenging, and we never have seen any hints of a bug in the design. Well worth having.
We have had this game on our phone for years. Still working our way through all the levels. Its one of the best sudokus Ive played.
It is the best game of any kind that we have played.
This has been our go to game for 4 years.
Love the game, easy to use, different and and ko milkyvcc challenge levels. Great when your waiting on someone and you have time, better for your brain vs non thinking games k Mm lvcd Know that you how x we a as w. V.
As your skills improve the challenges of each level push you to solve harder puzzles.
No crazy animation, just a good straightforward game.
Love playing. We're not very good but we keep trying.
For us, the best Sudoku game app.
This particular Sudoku app has been our go to numbers puzzle ever since Ive had an iPhone…2009. Ive tried other sudoku apps, and some are pretty good, but this game allows a variety of colors for the playing board, which we really like. Lots of toggles for the hard-core players. Enjoy.
We have been using this app for a long time. It does what you want without dealing with animations you dont want.
Ive tried most of them and this is the only one we continue to play.
Its been years that we play this one that we refute is the best Sudoku.
This is the only Sudoku game that we play every day and we love itthe best.
Love it, had this on our phone for 10 years and still well made and good difficulty.
This sudoku game is our favorite. Its easy to use and gives us just the right level of puzzles for us.
There are others with more functionality but when you just want to get your Sudoko on, this is all you need. Great work guys.
Endless hours of enjoyment. We love the ability to add notes with possible numbersits much more legible than on paper. Great appbetter than paper.
We really enjoy playing our sudoku puzzles, we would rate it a 5 stars.
Many well designed sudoku setups with different levels of difficulty.
We love the game! This app was worth upgrading to the paid version.
User feedback from Apple App Store
App Details
- Version: 2.1
- Size: 14.97 MB
- iOS: 12.0 or later
- Languages: DA, NL, EN, FI, FR, DE, IT, JA, KO, NB, PL, PT, RU, ZH, ES, SV, ZH
- Content Advisory:
- Developer: Red Key Software Corporation
Last updated: 3rd December 2020 | Genre: Strategy, Puzzle | Developer: Red Key Software Corporation