PianoMeter is a piano tuning app that will transform your Android device into a professional quality electronic tuning aid. NOTE The "free" version of this app is primarily for evaluation, and it only allows you to tune notes on the piano between C3 and C5. To tune the entire piano you will need to buy an upgrade through an in-app purchase. What makes PianoMeter unique Unlike regular chromatic tuning apps that simply tune to a pre-calculated equal temperament, this app actively measures th