This app is a waste of time. You could play every note at the same time and it would count it right. I love how in the adds it never mentions how you need to pay for it because charges you 25 dollars a month for three months, Thats 75 dollars for three months of an app that doesn't even work. if I could rate this lower I would. Just stick to youtube. DONT GET THIS APP IF YOU DO DONT PAY FOR PREMIUM!!!