There are many many sudoku apps out there. Some of them give an occasional ad. This app is well done, but there's basically an app between EVERYTHING YOU DO in this game. Need to pause the game? Heres an ad! want to start a new puzzle? Heres an ad! Yay, you finished a puzzle! Watch this ad! Want to look at the daily to do your award puzzles? oh you need to watch an ad. This isnt a puzzle app so much as its an app to watch back to back ads. Garbage.