GuitarTuna

Keep stringed instruments in tune with Guitar Tuner Free.

This Android application utilizes the device's microphone to detect pitch. It can be used on a variety of instruments, not just guitars. Within the application, users can choose the instrument they want to tune, select a note, and watch as the tuner measures pitch. The arrow will move to the left or right of the grid to indicate if the string is flat or sharp.

Beyond the standard tuning features, the application also helps musicians to improve their skills. Guides are included to change an instrument's tuning, improve aural skills, and learn new songs. There's also a handy metronome that helps to keep tempo.