Very nice app!
1. Add menu option to enable/disable sharps and flats. Should make it easier for a beginner like me to choose from only seven sounds.
2. Add menu option to play sounds from three octaves instead of just one.
3. When in 3 octaves mode, add menu option to make sure the consecutive sounds are separated by more than octave, to train the ear to hear the absolute pitch instead of the interval.
Hope it is not too much trouble to make these changes. Looking forward to enjoying your little app even more!



