I’ve written about GuitarCapo+ before and it sure has advanced since then. Now it’s not only an amazing virtual instrument, but it’s a priceless educational tool for guitarists both young and old. I’m also pleased to say that the developer of this app is welcoming of constructive criticism. As a fan of the app it’s encouraging to see your suggestions are listened to and implemented (if sensible).
I have some crazy ideas from time to time.