Edit: Most recent update tripled the cost of hints and the ads have gotten longer and more frequent. What the heck? There are a lot of games like this one and I think it is time I check them out instead. Just a shame because I've played this one for years. Challenging game with many levels and updates to keep it fresh. However, the ads are constant and that is what keeps me from playing more often. I've considered deleting the app altogether based on the number of ads alone.