Tuning

One way to tune a guitar is with a phone app, such as DaTuner, or gStrings. Make sure you choose the free version. You play a string open, and the app tells you which way to move the tuning knob. When the string is in-tune, the display on the screen will change.

Some tuners use sharp and flat ( '#' and ' ♭ ' ). This is explained here.

There are other ways to tune a guitar. todo