Play a note
Tuning fork
Reference note
Drone
A sustained sound to practise intonation. Tuned to your chosen A and temperament.
Stops automatically after 10 minutes.
Intervals
Beats
Two almost identical sounds “wobble”: the smaller the gap, the slower the wobble. That is how you tune by ear.
Practice
Saved tempos
The metronome runs on the audio clock: no drift. With the screen locked, some phones (notably iPhones) suspend sound.