I think this app is one of the best piano apps ever. I have to face facts, I am never going to learn how to play the piano so this app is just right for me. Its foolproof. The only problem I have with it is that if you accidentally tap the ad at the bottom, when you go back the sound goes away. You have to close the app and open it up again to get the sound back. Thus the advantage of getting the ad free version. Plus, I agree with the opinion that there needs to be more songs added to the list.