I love the way it highlights each occurance of the number you touch. This makes it much easier to see the pattern. 18 months later, there seem to be more adverts. I would prefer it ad free, or at least with the ability to stop the brightly flashing ads. I've got a bit of ADD and really don't like fast flashing lights. Hmmm, clearly my recent additional words didn't get saved. The app has been giving error messages lately about ".pdf file" not working properly. That is why I reduced the star rating from 5 to 3.

This was the suduko app I was looking for. I love it. Unfortunately when invisible ad windows get in the way of gameplay that gets really frustrating and annoying. I kept trying to use the pencil tool but an ad was laid right over it preventing me from doing anything until I closed it. Unfortunately after I closed it it came back within 30 seconds. If this persists I will probably lower my review and perhaps stop playing the game.

I'm with the other reviewer who said the ads have been increasingly resembling malware, with a pop up internet window stating "CONGRATULATIONS! You have won..." blah blah. Prior to the annoying malware the pop up ads were something I could deal with. You should have an option to pay for an ad-free version as this would easily be a 5 star app l.

WTH guys! After moving up through the levels I've found little incentive to keep going. At the higher levels it takes longer because it's harder and yet you can't make more than 1 star if you take longer than 4 minutes. Why bother?!?

Game was brilliant, but in the last few days it has started showing ads that after bordering on malware. Almost unplayable at the moment due to security risk.

I like to play this game when I have a few minutes between appointments but when you added ads that make noise you rendered the game useless for playing in a quiet waiting room...useless for the purpose I intended. I do not mind ads generally but noisy ones are intolerable.