HORRIBLE APP!!!

I downloaded this app after looking at all the good reviews on it. So I get it and I open it up. It stays open for HALF A SECOND and then crashes!! So I delete it and reinstalled it. I open it, it doesnt crash. Until it is done loading for 20 minutes!!!!! I am really angry that I cant find a decent app for learning how to play piano!!

Critics all round about Grand Piano Keyboard&Metronome