Hum is "humazing"(haha)
Seriously though, this app does all what it says it does. There are no lags and ads and bugs. The design itself is simple, yet effective. You can sort your "hums" by keys and give your "hums" notes and such. The only thing I would recommend is if in a future update, you could make folders and put certain "hums" in certain folders. Otherwise, its a great app!
Galactous about
Hum