FretBuzz is an application for practicing scales and arpeggios on guitar or bass guitar.
It uses CAGED system, a system that is widely used by guitar players.
It has support for left handed players.
It is support for six string guitar and bass guitar.
It covers the below scales and arpeggios;
Seventh and Sixth Chords
Major Scale Modes
Melodic Minor Scale Modes
Harmonic Minor Scale Modes
Whole Tone Scales