This is a joke! It does not give you the difference between sharps and flats in the scales, for the comparison purposes, and the tone quality is cheap and distorted. Actually, the entire design of this application is cheap and overly simplistic. When dealing with different temperaments, you must consider all flats, sharps, double-flats, and double-sharps within each system scale, even for comparison purposes. I don't understand why on earth there is not a single professional music app in the world! Are we becoming culture-less in today's society?