Lighten Your Gig Bag GuitarToolkit is a collection of essential guitar tools for your iPhone, iPad and iPod touch. An extremely accurate tuner, a precision metronome, more than two million chords, scales and arpeggios -- GuitarToolkit has it all and tons more. It’s so good, Apple inducted GuitarToolkit in the App Store Hall of Fame. Wow. You can buy GuitarToolkit in the App Store. And it's not jus