DS Trainer

DS Trainer listens while the app is open and helps you practice double stops. Play two notes together. The app names the higher note and the lower note, shows the pitch it heard, and shows the exact frequency of the nearest note. The percentage tells you how far the pitch is across the gap to the next half step. Green means the note is inside the in-tune window. Red means it is outside that window. Use the slider to set the in-tune window from 10% to 15%. Leave "Always look for two notes" off for normal playing. Turn it on when you want the app to keep looking for a pair. The microphone is used only while DS Trainer is open. Audio stays on your phone and is not stored or sent anywhere.

First release. DS Trainer listens while the app is open, names the notes you play, and shows how close each pitch is to the correct note. Use the slider to set the in-tune window from 10% to 15%.