Last updated on January 17th, 2026 at 12:03 am
Expert Sudoku – Strategy Game Review
Expert Sudoku is a Strategy/Entertainment/Puzzle game from Red Key Software Corporation, first launched in 21st October 2008.
It’s rated 4+ and currently has 72+ ratings on the App Store.
What Makes Expert 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 same great features with 1000 extremely difficult puzzles!
Warning! Expert Sudoku is for serious Sudoku players. Our hand-crafted puzzles are solvable with only one solution and no guessing. Show your expertise using advanced solving techniques: Naked and Hidden Triples, X-Wing, XY-Wing, Swordfish, Forcing Chain, 2-string Kite, Skyscraper, Unique Corner, and more.
OPTIONS
All options are OFF by default, but you can turn them on 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
• Four different skill levels
• ALL puzzles are solvable WITHOUT guessing
• Multiple color schemes
• Challenge a friend
• "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
Are you a Sudoku Master? Then play Expert Sudoku; you will love it! Otherwise, check out our other popular Sudoku games for iPhone and iPod Touch.
Do you want more? Try one of our other versions of sudoku which have all the same great features!
- Look for our paid edition of Sudoku with 1000 easier puzzles.
- Or try Color Sudoku for a fun twist to solving sudoku puzzles.
This Strategy game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Expert 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
Expert Sudoku is available through the official App Store for iOS devices.
Get Expert Sudoku on App Store
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:
What a great game! At first we couldn't solve a single one. We studied Peter Gordon's book and now we cruise–never have to guess. Our only suggestion is that there be an "undo" option. Many thanks to you who created this ap. 9/3/21 After all this time Im still enjoying this great Sudoku app. Every game has one and only one solution, and no guessing is required. Our only suggestion is that there be an option to cancel the Reset function. Its too easy to press accidentally. Holy cow! Ive been playing this game almost every day for all these many years. 2026 is hereIm no longer an Alaskan surveyor and Im nearly 83 years old!This game has given us years of pleasure and its helping to keep us sharp.
What a great game! At first we couldn't solve a single one. We studied Peter Gordon's book and now we cruise–never have to guess. Our only suggestion is that there be an "undo" option. Many thanks to you who created this ap. 9/3/21 After all this time Im still enjoying this great Sudoku app. Every game has one and only one solution, and no guessing is required. Our only suggestion is that there be an option to cancel the Reset function. Its too easy to press accidentally.
Challenging. Hundreds of games. Bug-free UI. Can't ask for more.
Its extremely challenging but, when you finally win the game, its extremely satisfying.
What a great game! At first we couldn't solve a single one. We studied Peter Gordon's book and now we cruise–never have to guess. Our only suggestion is that there be an "undo" option. Many thanks to you who created this ap. 9/3/21 After all this time Im still enjoying this great Sudoku app. Every game has one and only one solution, and no guessing is required.
As good as it gets. Very little Id change about this interface. Easy to use. Fun to play. Great way to challenge yourself.
Ive had this game for years. This is the first time it has asked for a review. Pros Doesnt light up whole rows Im in Doesnt make any noise Cons Should be allowed to vote after serving their time.
The app needs to reinstalled after the iOS 14 update. Just dont forget to set all of the options before you play.
Challenging sudoku good format easy to use.
Just updated to IOS 14.2 and this App now shows the opening screen and then immediately quits and the screen goes blank. App does not show running we the background. Deleted and reinstalled and Im up and running again. Good support page on developers site. Thank you.
Please port to Android some day.
We have seen past reviews claiming that the puzzles were not solvable without guessing. These are all solvable.
Please please update this for iOS 10.
We cut our teeth on the novice level, and now no other format is quite as good. We're in the expert level now, and having the option to color boxes would be fantastic. Thanks, guys.
The Genius level will really knock your brain out.
We're hooked. Great challenging levels to work through. Wakes up our brain. Great selection of more challenging puzzles. We play until we get tired as we prefer something number (not word and image oriented) to settle our brain before sleeping.
Play every day! Helps us relax.
One of the best apps out there… And we've tried a LOT! Enjoy.
The app is great. We play it almost every day. The levels' difficulty is challenging and fun.
We really enjoy this game & the challenges it offers.
Very challenging, and enjoyable.
Great interface very challenging games highly recommended.
Quality app, visually appealing, good challenge. We'd like a feature to allow us to touch a number and then touch cells to place that number until another is selected or the number is deselected.
Love the different options available. To make it even more difficult or less difficult! Easy to use. Love it.
Love this app! Nice color options, different levels, it's great.
Great app we would not hesitate to download it.
We played the original version until we had completed all 1000 games. Now trying the harder version and it is just as fun and addictive. Worth the money.
The toughest puzzles we've even seen. Exciting challenge.
Good game to stretch your brain.
Occupies time but keeps your mind busy. Very difficult but you get a sense of accomplishment when you solve the toughest puzzles. Enjoy.
Very challenging ! Play it a couple times a day.
Challenging at all levels. This is our favorite App. Love the pause and resume features.
Challenging. Hundreds of games. Bug-free UI. Can't ask for more.
Play this almost every day. Love the set up. Puzzles are also challenging which is exactly what we wanted.
Great app – easy to play, but hard to solve.
Have been playing this for over 1.5 years still the best.
Lots of fun and a great challenge.
Challenging if you don't know advanced technique.
Great boards, absolutely addictive. Just wish there were more puzzles.
Been playing this game for over two years and still love it. Keeps the mind going and kills a lot of time when your waiting. Sometimes you have to take an educated guess but it's still a great game.
We bought this version after working our way through this company's novice sudoku game twice. We love that they include so many color options, (our eyes can see the numbers more easily with some color combinations than others, for some reason), the option to have the timer showing or not, whether to show wrong answers and completed numbers, and the ability to have smart notes or not. We've tried playing with all the available settings and finally found one that works for us. We love this game.
Love this app! Been playing for over 3 years.
Thanks for the design of this Sudoku game. We've tried many but this one gets our attention most.
Thus game keeps us occupied almost daily. Games are sufficiently challenging, although not all of the genius-level games are as difficult as they should be. Thanks for producing a quality game.
Nice features, simple design, challenging levels.
We love this game. All the puzzles have single solutions. We do have a feature request though. To make techniques like coloring and chaining easier we would love it if we could color cells. Just two colors would be enough. Applying the color to whole cells would be great, being able to color individual notes would be the ultimate. Thanks for listening.
Sudoku is great brain exercise and the Mighty Mighty implementation is very well executed.
We've spent hundreds of hours on this and the previous version and was nearly complete with all the levels till they bumped the games to 250. We also like color sudoku.
The expert edition provide the most challenging Sudoku puzzles we have found. They take much longer to complete. Some have taken as much as 30 minutes to finish. We like that.
A great ap. We have spent many airport hours. Challenging, but doable.
User feedback from Apple App Store
App Details
- Version: 2.1
- Size: 8.94 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, Entertainment | Developer: Red Key Software Corporation