This app uses your microphone to auto detect the string being played and indicate if you should tune up or down. Tune into the orange region for a good results or green for perfection.

A Guitar image shows the current note being played or allows fast note selection in manual mode.

Guitar tuning doesn't have to be EADGBE, Tap the tuning text box and then select from over 100 alternative tunings. Alternatively use the arrows to make your own tuning. Note that you will need to change strings on your guitar for some of the tunings to avoid over tensioning them.

Shift function for or those that don’t want A to be 440 Hz (e.g. orchestral tuning). Snap feature to quickly shift to the nearest detected note.

Equal Temperament (ET) / Just Intonation (JI) Tuning .

Pitch pipe function.

Frequency detection from 30 Hz up to 4186 Hz (unshifted B0 to C8). Whilst optimised as a guitar tuner, this app can be useful for tuning many other musical instruments.