I'm a fairly beginner jazz guitarist, mostly concentrate on classical and folk. I just bought this app after reading rave reviews, and like others on this thread, am disappointed that the chord diagram feature is so limiting. Of course, it's great if we have a bunch of them memorised, and don't need diagrams at all. I have a relatively small number of moveable chords memorised, that cover all the most common jazz voicings. But surely, customisable chord diagrams are possible? It would be a HUGE benefit for those using this app to improve their playing.