This app is really bad. It recognizes other notes as the notes it tells you to play. I accidentally pressed C# instead of middle C, and it recognized it as middle C. Along with F, E, A and B. It ALSO recognized my voice as the notes. I said the word "no" to respond to my sister, and it recognized it as C???? It doesn't make any sense!!! I tried looking at the help section of the app, but it didn't give me any help at all.