MetroNome
-The sound speed varies depending on the BPM and can be set according to the bpm.

MetroTone
-A, A#, B, C, C#, D, D#, E, F, F#, G, G# in order
The sound consistently matches the sound of the set value.

Tuning
-Tune to a guitar or other instrument that needs to be tuned.
Basically, it takes a note to the phone, inputs it, and keeps changing the note until the desired note appears on the screen.