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If you haven't updated your app yet and are still using a version from before September 9, 2018, DO NOT UPDATE. The game no longer works with that update. It will not even register that you are touching the screen. In spite of numerous reports and complaints, the developer has yet to do anything useful about it. Previous review: Simpler is better! After using a few programs with silly bells and whistles, this is definitely my favorite. It best replicates the comfortable feeling of doing the puzzle for yourself, rather than to necessarily beat the clock or hit a certain score. You have a clock if you want to beat it, but its presence is unobtrusive and pressure-free. You won't get hit by onerous penalties if you touch the wrong number or button (unlike a competing version that I have since uninstalled) and it's pretty hard to hit a wrong button anyway, because everything is arranged so well on the screen. If you DO feel competitive, you can check your position on the leaderboard and keep an eye on the clock, but none of the competitive aspects will ever get in the way of those times when you just want to relax with a favorite number puzzle. Get this Sudoku app and you'll forget all about the others.

So, I had thought that I couldn’t finish the puzzles on the ‘hard’ level because I had it on that level of difficulty... but I always encountered the same problem... Every single time I tried a puzzle on ‘Hard’ difficulty, I would get the puzzle close to being done and then would not be able to make a single next move.. and this happened A LOT. I would come back to it the next day and double checked multiple times and still could not go anywhere with what there was unless I just guessed a number.... so I would have to end the game and start a new one. i have been playing sudoku for a very long time and have never had this problem before. And then today, I played on ‘Medium’ and the numbers that are already set have the 9s placed to where it’s impossible to put a 9 in a box section that needs a 9. I have a picture to prove it. It just makes no sense and the numbers given to start out with are poorly set up to where it’s impossible to solve. So now I’m thinking I wasn’t crazy when I couldn’t finish the puzzles on ‘Hard’ difficulty when that is usually the level I play on. Will be deleting...

Update: I may be thinking of a different app made by ticbits but that doesn’t change anything. The latest update still seriously broke things. The app used to be made by ticbits (or similar name) and was great then. It must have been sold to someone that doesn’t know what they are doing because the thing has become the most annoying sudoku I have ever played. It crashes and proceeds to forget several of your previous moves. Tonight it crashed as I was putting in the last number in the last square and it forgot the entire game when I got back in. It has been long enough since the update that the developer should have done SOMETHING by now. Back out the current version and put the old one back in the store. Anything would be better than this. I know they are aware of the problem because they have responded to other reviews. Zero stars if I could!!!