Stimmi is our own app for tuning and intonation practice. It recognises the note being played, shows it on the staff and says in plain words whether the pitch is sharp or flat. In target-note mode it sets a note and rates how cleanly it is hit. The free version is aimed at children and beginners on an instrument, the paid version at teachers.
Stimmi is our own project: concept, design and development are entirely in our hands.
