5 stars: Honestly, it's the first free sudoku app I've found that is actually difficult. The \
4 stars: Good game, well setup would be a 5 star except for the multiple ads inserted at the start of every game. One timed ad is quite enough. Two or more are excessive. One advertisement per game would be sufficient. Two or more are simply a waste of time on a 4-8 minute game. It may not sound excessive, but 2 minutes of ad to play 6 minutes. Not a good use of my entertainment time.
5 stars: Works very well, no issues except for an occasional freeze when the game has been running in the background for a while. Good to pass some time. Ads are not ridiculous and only pop up every few games. Not sure about the scoreboards, though! I think someone has the game hacked.
4 stars: challenging at the expert level. help is good. i find the screen a little difficult to study, mainly due to the color. changing colors of the squares does help. options to change the colors would be an improvement. would like this app to optionally prevent the phone from going to sleep.
5 stars: An interesting game, that seems to take longer to complete than others in LA Press news paper. Quite difficult some times. The game sometimes changes from horizontal on my tablet to a vertical position, which I don't like, and I am unable to change with out closing the game.
5 stars: Got this just to help pass time and test my dumb brain and honestly even the Easy mode is a challenge so I have plenty ...