"Tune your guitar, bass or other
instrument with n-Track Tuner. Just put your Android
device next to your instrument and play each string,
the tuner will automatically recognize the note
you’re playing and tell you whether you need to
lower (green bar) or increase (red bar) the string’s
The spectrum analyzer provides a visual feedback of
the notes played by the instrument and shows a small
arrow to highlight the harmonic whose pitch the
tuner is tracking.
For those who prefer to manually tune their
instrument the ‘Diapason’ view lets you play a
reference tone, ‘A’ (440 hz) or any other note that
you can select dragging the frequency slider."