Transitioning from piano to guitar requires a different mindet, and to speed things along I chose this app to help with chord shapes etc. It works pretty well, easy to use but a few annoyances with the interface that could be fixed easily. 1] When selecting a chord, you have to scroll through to the fingering you require, it plays each selection once and when you stop there is no way (or not blindingly obvious) how to repeat the hearing of the chord. Some way of playing and repeating the chord would be appreciated.2] When you scroll to a chord shape you require, then say select a min or dominant flavour, when you return back to the chord you had previous, it takes you back to chord number 1. Madly annoying if your chord is say 9 of 16. It beaks concentration having to constantly navigate back to your preferred chord position. Could you not make it so the numbered chord is remembered when you leave and return to it's group?3] The ability to store a series of chords would be a great addition. I'm working through the ii-V-i major 7s right now so having them lined up and being able to quickly select them would be mind blowing. Right now i have to dial them in, hear the chord once, badly play it on my guitar, then have to navigate to the next note, dial in the next chord, hop to the desired position, hear it once,, play it badly, rinse repeat. I think you get the idea. Could be slicker.I think with these and a few more features this would be an app I would pay for. I'd even be happy to make a paypal donation as I appreciate the hard work that goes into making an app. This is a good app, clean interface, no nonsense, no adverts, but the effort to take it from good to excellent is a small step and hope it's something the developer will consider.