Really, really good!

This app is perfect for me!

I used this app for both my guitar and my keyboard and it lets me very easily tune each of them. My keyboard was in tune, but my guitar wasnt. Now my guitar is also in tune.

Thank you to the maker of this tuner app. I would highly recommend it to anyone who has any instrument or various instruments.

Annie Alvina about TonalEnergy Tuner & Metronome, v1.4.2