NoteNail makes software for people who sing.
We build small, focused apps around one idea: you should hear the difference, not just be told about it. Our first app, Sing!, lets you sing a phrase of a song, hear yourself back — as sung and with the pitch quietly corrected in your own voice — and see exactly where the two differ. Then it gives you an exercise for that one spot.
The measurement is honest: scoring runs on your untouched voice, the takes you sing in exercises are never stored, and the numbers behind the app come from published research on how people learn to sing in tune.
Apps
From the blog
A semitone is 100 cents. Listeners forgive a voice about twice as much as an instrument, and the threshold for "out of tune" differs from person to person.
Why you sing off-key (it's not your ears)Most adults who think they are tone-deaf hear pitch perfectly well. What is broken is the link between the ear and the voice — and that link can be trained.