Harmonica tuner

I'd love to give this a better rating, because the app itself is great. Only a metronome lacks. BUT the app is constantly being detected to use the microphone running in background, which is inacceptable, when I don't use the app. This app doesn't need to be running in the background. It does not need full internet access and it does not need to know which connections I use. At least not, if you don't spy on me.

Would love if I could pay for it and not have the commercials they added in

Great application, very useful especially for learning and fine-tuning bends and overblows. Would be even better if it handled lower-keyed instruments (e.g. Hohner Thunderbird), which in my experience are harder to bend. But perfect for any middle-key harmonica.