Four strings? Chords are ok but you can't really play the banjo. It's more like making a bunch of banjo sounds as opposed to playing an instrume t.
Four strings Helpful if you could configure number of strings, tuning..
3 Its really good but you cant strum all of them at the same time
Screen size? I don't think it's fitting correctly on the screen of my nexus 4
Out of tune You can't strum all 4 strings all the time and it's certainly out of tune.
Fun Its like a real banjo
•Ability to change fretboard color