Wish I Could Get A Refund

Im not sure why so many people like this product. Is it possible that I received a dud download. I own 8 guitars and this app will not tune the bottom E string on any of them. I even plugged my guitar in the earphone jack with an adapter and it didnt work any better. Another $5. rotten apple core!

drbrock about PolyTune, v1.1.0