Hi Zach and Jack, I hope you guys read these reviews. I’m a sudoku junkie and you fellas have yourselves a very nice little app here. I have 2 issues to report, one, kind of a big deal, the other not so much. The one that’s not a huge issue is a graphical issue: on phones that have the notch at the top of the screen like the iPhone X, Xs and 11, there is a graphical glitch that makes the “horns” of the screen white while the rest of it yellow. Now the 2nd issue: related to the Techniques functionality. When browsing a given technique, and then clicking Hint to get more info about the technique, you’re then given an option of Show Me. The issue is that when you click Show Me, there is hardly any time (about a split second) to see what the system is showing you. Almost immediately after clicking show me, the screen gets covered by another dialog box and it’s only options are to go back to the main menu, or try another example. For people to be able to learn, the screen that results from pressing Show Me needs to persist for as long as the user needs it, and further, you should be able to toggle back and forth between the before and after of the number changes. This is the other Sudoku apps do it. Great work so far and hope to see that update soon!

I’ve been using my iPhone for 4-5 hours/day for the last 10+ years, and every 3-4 years an app comes along that just changes everything for you. Apps like google maps, or dark sky. Brilliant execution that change how you experience your iPhone and bring joy to your life. Good Sudoku is one of those apps. It changes the process of solving sudoku puzzles from one of relentless scanning and book keeping to one of *really* engaging your higher thought processes and learning advanced techniques. it also, in just 2-3 days, has taught me more about how to solve sudoku puzzles, seamlessly, than i had learned in the previous 20+ years as a casual solver. The interaction is a delight, and i genuinely look forward to each new chance to play with it. These are one of the apps that I would pay money to rate 6 stars, and it’s the sort of app you should have no problem paying $20-$30 for. It’s good enough that i would recommend someone who loves sudoku to buy an iPod touch *just* to play this game.Game changer (literally) - thanks so much to the developer and designer who clearly put their heart and soul into it - you have made my life better.

The app pretty much functions as intended, there are ads which can be annoying but it’s to an acceptable degree. What really grates on my nerves while playing is that the background music can be super buggy. It sometimes will play the music for the game selection screen, but when you start playing a puzzle the music will cut out, or it will work fine but then cut out after an ad plays, or it will be silent but will come on for a few seconds and be silent again, and sometimes it will play both the music for the game selection screen as well as for the puzzle at the same time. I have to close and reopen the game multiple times to try to fix it but sometimes this doesn’t work either. This was not really an issue at first but has gotten so persistent to the point that I now avoid playing the game because it’s so frustrating. Still, it’s otherwise a decent app so I don’t have much else to complain about. For me personally though, this may be enough to drive me to uninstall it altogether. Also, I wish there was some kind of dark mode that wasn’t locked behind a paywall, because it honestly hurts my eyes & I hate the color palette, but I’m not willing to spend money just to change that. I’d rather just not play it. But that’s just me.

My prior review seems to have vanished for some reason. This is a good app but the bugs are driving me bonkers. The AI that attempts to guess when you’re done eliminating candidates has been extremely flawed from day one and has literally always been more of an annoyance than a help. There is an option to turn it off in settings but the app ignores it. The developers response to my previous review about the setting being ignored? “If you don’t like that feature you can turn it off.” GEE THAT WOULD BE SWELL, MAYBE YOUR APP CAN LISTEN TO ITS OWN SETTINGS. This current release not only STILL doesn’t fix this, it’s now worse. Now not only does the AI still randomly stop selecting a cell/group of cells when attempting to eliminate multiple candidates, it now also randomly switched modes to entering numbers. So in the middle of eliminating candidates it now, without warning, enters the number I’m trying to eliminate. This has caused the app to register multiple “errors” in arcade mode and is really making me angry. Seriously, no one asked for this candidate AI “feature” and it has never worked. It is so buggy that even turning it off doesn’t work. This one thing is completely ruining the experience of an otherwise excellent app and I seriously cannot understand why getting the app to listen when I turn it off in its own settings is apparently so hard for the dev to accomplish.