This thing jumps all over the place. Sharp then flat then sharp... Never settles down. If you can tune by ear at all I doubt you will use this. Had acoustic within 6" of mic with no background noise, adjusted dampening and never saw it perform better. It may be worth $2 but Im really questioning that. It does not replace a tuner in my view. Really wish it did!
Ajcorson about PitchBot - Smart Chromatic Tuner