With so many variations, and so many levels of each variation, this game provides almost too much logical puzzle-solving fun. Great brain workout for brains of all ages. Update Sept.'17: Downgraded a star for including ads which force sound even on a muted phone.
Formerly rated 5 starts. It's an easy to play format and you can change the board style very simply. Trouble is that since I rated the app (gave it 5 starts), I get an ad after every game. Prior to me posting a rating, there were NO ads. Why? Now I don't like this ad infected game.
I've only played one game so far, after a brief obsession with (paper & pencil) Sudoku a few years ago. The first game (on easy mode) was fun and fast. The controls were intuitive and helped me quickly remember some of the Sudoku strategies that were rather hazy memories by this time.
The app itself is great 5 stars. The ads after each game ruin it, some can only be got rid of by logging out. It's not as if the ads are for anything useful either. I shall probably stop using it. I would happily pay a premium to have an ad free version. Please get rid of the ads.
This used to be a 5 star app. BUT, since upgrading, I now get adverts after every game and they stay active longer and longer. The last advert wouldn't let close it even after 4 min. I had to force close it. Great game but they've gone too far. Goodbye. DO NOT UPGRADE !!
Easy control and option setting. Had this on a different phone couple of years ago, things have only gotten better. Was very disappointed when couldn't find on apple, so the moment I got an Android again I downloaded it! Keep up the good work.
v1.5: Fixed some crash bugs of the game. Thanks.