PitchTrainer: Music Tuner

This is an application that you can practice the pitch of an instrument as if you were playing a game.
Tune the instrument on the tuner screen and
Check the pitch with a polygonal line on the training screen.
The correctness of the pitch is displayed in three colors: green, yellow, and red.
function
-Detects C1 (32.7Hz) to E7 (2637Hz).
・ Pitch detection is performed 5 or 10 times per second.
・ The reference frequency can be selected from 438Hz to 446Hz.
・ Equal temperament and just intonation can be selected (Tuner is always equal temperament)
・ Permission to use the microphone input is required. Please set at the first startup.