Im almost proud, so to speak, of this app and of myself having found it; it has been a wonderfully fun and effective program . Versatile and thorough! This app is a great fun little workout for musicians learning to sightread more accurately, polish your sense of pulse in a particular meter, or just challenge yourself and your friends to greater precision and shrink that deviation factor in your playing! As a pianist, my flexibility with sightreading rhythms is a key factor in my success. While not a one-stop toolbox for great musicianship in regards to rhythm, it has made itself indispensable on my iPad.