There is a lot too this app and a bit of a learning curve, but I seem to find a new way to use it every time. It does the basics you would expect in a chord app like showing you fingering variations, reverse chord lookup or key transposition. But there are also some unique features that help with figuring out or creating sings -- you can enter a partial list of chords and it will figure out all the potential scales,keys and modes that harmonize. Has helped a lot with me learning more about theory and understanding the fretboard better.