Great app! This is by far the best sudoku app on the market. Large variety of game modes and difficulty levels, with easy to use interface. *Edit: Screen timeout issue on S4 has been fixed with the latest update! The consistent support / updates, and the fact that the devs listen to the community gives this app an easy 5 star rating.
Some Confusion One of the puzzles I recently completed (after picking it up and putting it down over a period of days) actually had TWO solutions. On the top row in the middle house, 7 or 3 in the corners could be substituted for each other and the same substitution coulld be made in the middle house on the bottom. The first time I ever came across this peculiarity.
addictive but not flawless There are a few puzzles with mistakes so no solution. Also there are now ads appearing in the top bar above the puzzle some of which flash in an annoying way. Overall still like the game.
Great brain game There are many different levels and as you go up a level you have to think more. I really like this game a lot. I don't mind the ads either. The thing I have problems with is the flashing ones. They cause migraines to flair up. Also, distract your attention from the game. For that reason, I would have given this game a 4 1/2 rate, but I didn't know how to do it. All in all, this is a great game. :-)
Frustrating I don't like that you can't move from arcade to challenge. You can't get back to the main menu after you open either arcade or challenge. It won't go to the main menu and I can't get out of beginner arcade. It's getting deleted.