You’ve never played Sudoku like this.
Good Sudoku turns your iOS device into an AI powered Sudoku genius whose only mission is to help you learn and love this classic game.
Whether you’ve never tried Sudoku, or you play every day, Good Sudoku’s elegant layout, intelligent hint system, and busywork reducing tweaks will help you play better and have more fun.
- Over 70,000 of the highest quality puzzles you’ll see anywhere
- Optional tools to reduce busywork
- AI powered hint support to continuously boost your skills
- 3 standard modes: Good, Arcade, and Eternal
- 3 Daily puzzle modes that get harder throughout the week + global leaderboards
- 5 levels of difficulty
- Import your own puzzles from elsewhere in Custom mode (and share them with friends!)
We put everything we could into making the best digital Sudoku game ever released:
- We wrote a puzzle generator from scratch to create over 70,000 of the highest quality puzzles you’ll see anywhere. We spent weeks figuring out how to generate intricate and complex puzzles you won’t find in other Sudoku apps. Our hardest puzzles require wild techniques like “XYZ Wings”, “Hidden Quadrouples”, “Jellyfish”, and “Swordfish”.
- Most people don’t know this but Sudoku puzzles are actually generated by programatic Sudoku solvers. The fastest way to know how hard your puzzle is, or if it’s valid, is to write a solver that knows all the strategies that can try it. With Good Sudoku, we run our solver as you are playing, so if you get stuck, it can detect what you know by looking at your answers and your notes, and then help you find the next technique you need to solve the puzzle.
- Most Sudoku games classify difficulty into vague Easy, Medium, and Hard difficulties — But what do these difficulties mean? Typically they refer to the kinds of solving techniques that are required to solve a given puzzle without resorting to guess-and-check. In Good Sudoku we aren’t vague about it at all. We lay out exactly which techniques are required for each difficulty level. Good Sudoku allows you to practice them individually outside of puzzles, and keeps track of which ones you’ve learned!
- When we first got interested in Sudoku we noticed that a lot of players spend most of their time looking at the board and counting. On easy puzzles, this counting serves as a way to increase the difficulty by making the puzzle take longer. We know some sudoku players love the counting but we found it a bit tedious and designed some tools to alleviate the busywork. At first these tools might feel a bit like cheating, but once your mind is freed up from counting you’ll have space to see the much deeper more fascinating side of Sudoku: all of the beautiful technique structures. Freed from the burden of busywork Sudoku becomes one of the best search-style games we’ve ever played. More fun than word-searches and solitaire, high-level Sudoku is a real treat — and with Good Sudoku and a little practice, anyone can learn it!
- We noticed when looking at other Sudoku apps although there are often daily puzzle modes, those modes never include global leaderboards. Weird! Good Sudoku remedies this problem!
- We wanted to make the best Sudoku out there, and while we’re proud of our puzzles, we recognize that puzzles come from all places. That’s why we built a quick and easy custom puzzle mode into Good Sudoku, so if you have a paper puzzle that you’re stuck on, or you’re trying some wild variant (Like the Miracle Sudoku!) it’s easy to put it into the game, play it, and share it with your friends. If the puzzle follows standard Sudoku rules, our hint system will even help you get unstuck!
We truly hope Good Sudoku can introduce you to, or deepen your love for this great game.
-Zach and Jack
Thanks to the Devs for making Sudoku accessible. And guess what?.... it’s actually fun once you wrap your head around it.
Place your first number, and an add will start. Except, while that ad is running, the game continues to auto-solve the spaces for you... but puts them in the wrong space. So your board becomes unsolvable unless you undo the moves. It is a poor design choice to have the ads be a part of the game, and especially bad that the game continues while you aren’t even looking at the board. Garbage ads, garbage app. It was an easy decision to uninstall.
Sudoku game works great, functions properly. Only issues I have is the daily ranking dialog and notifications. It blocks the UI screen and causes the game to be affected. I don’t care for it to sync or what my ranking is. I rather have a link to view it than the app tries to sync with iCloud
I love the look of this app and that it seeks to help you improve your game- but when I tried to play through the “note taking” tutorial I get to a certain point and it won’t let me progress. It says to hit the 2 to see all the options, no matter how many times I click it won’t do it and it’s frustrating because I really want to learn ! Please fix it! :(4 stars because it’s still fun and a well built app, but I wish it functioned properly
Edit 2 in response to dev response: the whole issue is that I DID turn off the notation AI but it didn’t actually turn it off. Edit: every time there’s an update I get excited, thinking that surely this is the one that will allow me to actually turn off the buggy and unhelpful notation AI that keeps unselecting boxes when I don’t want it to, but every time so far I’ve been wrong. Such a ridiculous and unnecessary issue to be so persistent, especially when the option to turn it off is there it’s just that the app won’t listen to its own settings. I like many things about this app. It took some getting used to, but this is my go to app for sudoku and I play it for 1-2 hours every day. I never thought about just how tedious it is to finish houses toward the end of a solve, but after not having to manually do it for a while it feel fairly tortuous to have to go back in the classic puzzle challenge or in other apps. The hint system is good, but the “improve” AI that supposedly tracks what techniques the player knows based on gameplay stalled out once it judged that I knew the first couple dozen techniques on its list. It doesn’t credit me for solving puzzles with some of the more advanced techniques even though I am using them. This is a minor thing and doesn’t impact the playability.The app’s insistence making a distinction between ruling out a candidate vs not marking it to begin with is a puzzling semantics issue. For one thing, keeping the candidates visible with a red line through them clutters the visuals of the board. The other issue is that more than once I have burned a hint only to have it tell me that something isn’t a candidate in a cell where it isn’t marked as one, simply because I accidentally removed it instead of putting a red slash through it, meaning I get penalized for using a hint without actually getting help. Also, If you remove the candidate entirely from a cell the system still highlights it when you select that number. Lastly, the candidate selecting AI drives me bonkers. It tries to guess when you are done highlighting/eliminating candidates when multiple cells are selected so it can “helpfully” deselect the cells for you (how this is supposed to be helpful or who asked for this feature is beyond me) but it almost NEVER gets it right which causes endless aggravation as I have to select the same group of cells multiple times to finish editing the candidates. Especially aggravating that I turned this “feature” off in the settings but it refuses to stop doing it anyway. Please allow us to turn this off for real.