Guitar Intervals Pro

This is an app to learn intervals on guitar neck. Click on the note to play it. It has intervals for standard and some drop tunings. 

It has right-handed and left-handed mode.

Intervals are the distances between any two notes. All harmonies or melodies can be considered as a sequence or layering of intervals. The quality of an interval can be Perfect, Diminished, Augmented, Major, or Minor.