Keeping your guitar in tune is essential to your musical development. Not only will your chords and songs sound better, but you will also train your ear. This app is designed to help you to train your ear.
At the top, you can see the buttons with the name of the strings. The goal is to tune up the corresponding string with the sound that you hear. It might be a little bit difficult at the beginning, but over time, you will get better with it.