The chord diagrams that are available don't really teach you how to apply theory onto the guitar, they're just isolated shapes.
Having the option to display where the chord tones and scale degrees are on the neck in whichever of the five 'C', 'A', 'G', 'E', and 'D' positions you choose would beat out any competiton in this area. If you'll let me, I'll do it myself for free. I don't care, I just want to enjoy practicing for once.
I can't be the only guitarist here who sees the importance of CAGED. Every 'box' shape for scales you ever learned was because of the CAGED system. It not only shows you how to play scales but how to form any chord you want at any part of the neck.
