With our app, you can turn your phone into a true tuner for the acoustic guitar and electric guitar. Completely free, with tuning accuracy proven by musicians. Simply choose the string you want to tune by clicking on the button with the main note of the string and pluck it repeatedly until the indicator turns green. Advantages: Free No registration required Fast No crashes Lightweight Efficient Download it now and enjoy! If the app is unable to hear the notes played, your microphone is likely being used by another app. In this case, try closing all background apps (including the tuner) and restart your device to try again. Also, make sure all permissions have been granted and that your device is close enough to the instrument for it to hear the notes played clearly.