You can play a lot of notes without any ads. You mainly only get an ad after changing a chord. You can click the X to get out of most of the ads within a few seconds of them starting, and you only get one ad, before you can go back to playing. You get one ad when you open the app that you can exit by the time a few seconds of it playing goes by. There are not many ads in the app now. Sometimes you get the same ads, but, that really doesn't matter, since you can stop almost all of them nearly immediately, and you don't have to watch the whole thing.