Learning to play the guitar can be very challenging. It may have just six strings, but there are hundreds of positions and fingering combinations as well as different strumming patterns that you have to remember. That’s probably why I don’t play guitar.
The PocketStrings device can help those learning to play guitar through muscle memory. It is about the size of a remote control, with a tiny four fret board that lets you practice chords and riffs. You normally can’t practice without the actual instrument on hand, so this is the next best thing.
The problem is that you still can’t strum and hear the notes, so who knows how much this would actually help you play. At $30(USD) it might be worth a look, though you are bound to look odd playing with this in public.