It works!

I have tried other tuners on here and this one works great for me, with the background sound filter you can set it up so that only the notes from your guitar are picked up. But if u set it to tight it will bounce around like a drunk sailor! Take a few minutes to set it up properly and it will reward you with a properly tuned guitar if u forgot your regular tuner at home. I would not suggest that you throw away your electronic tuner but it is really handy when you dont have it with you.

96th Navy about Guitar Tuner - Chromatic, v2.0.1