Free tool

Tuner

Play one open string, just one, and let it ring. The tuner listens and tells you where you are. Nothing is recorded, nothing leaves your phone.

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Play a string, gently.

The six open strings

From the thickest to the thinnest

Three things that help

Always tune upwards: if the string is sharp, go below the note and come back up. It holds better.
A new string keeps stretching for two or three days. That is normal: tune again before every session.
If one string refuses to stay in tune, look at the bridge and the head before blaming the guitar.

The app’s tuner hears all six strings at once and remembers your guitar.

Pick your level, pick up your guitar: your first session is already waiting. Ten minutes is enough to start.