I have owned this app on iOS for years. I paid the 8 dollars on iOS to remove all adds and that's what I got. When I got it on android I paid the 8 dollars and still got nailed with add for hints. I've looked at the developers notes and it does not say that even after paying the 8 dollars you would still have add for hints. For the cost of the 8 dollars it should remove ALL adds not some like it did on the iOS version. The developers showed no care through email either!