Extreme Difficult Sudoku 2500

Really liked this. Played through all the games, then reinstalled it to play again. But now every time I open the game, there is a glitch: instead of the game starting, a MAX Debugger page appears which says it works with multiple platforms, and I have to back out of this page to play the game. I don't feel comfortable with this app now, as I don't know if its sharing with those platforms.

The controls are slightly unintuitive. It took a while for me to realize that the "pin" button holds down the number I want, thus allowing me to fill in squares without constantly returning to the number selection. Despite this singular issue i have with the app, there are an incredible amount of puzzles and difficulties without really other drawbacks. Ads aren't too bad imo, and easy to avoid. By far one of my favorite apps.

One of the best sudoku apps available. Literally thousands of puzzles, and the ads/monetization is very sparse. Offers a good range of difficulty, from easy/medium to some extremely difficult ones. Literally could not ask for a better free app. My only minor nitpicks are the controls could be a little more intuitive, and maybe some diverse UI options would be nice. Also if placing a number could auto clear candidates in the same block/row/column that would be cool.