Play the rhythm against the click
This is the half most free tools skip. Pitch does not matter here — play any note, or tap the body of the guitar. What is measured is when.
About timing accuracy
Your computer adds a small, unknown delay between the string moving and the browser hearing it. That means consistency — whether your notes are evenly spaced — is always measured correctly, but rushing or dragging is only as accurate as the delay estimate below. Headphones are strongly recommended: through speakers the microphone hears the click itself and counts it as a note.
Practise a piece
Bring in a piece as MusicXML — Guitar Pro and MuseScore both export it
(File → Export → MusicXML, uncompressed .musicxml or .xml).
Openstring splits it into short chunks, drills each one, then drills the joins
between them, raising the tempo only when you play it clean.
Chunks
Seams are the joins between chunks. They get extra attention because that is where pieces come apart.
What you actually know
Every position, coloured by fluency
Green is fast and accurate. Amber is correct but slow — that is not learned yet. Red needs work. Grey has not come up yet. Dashed means it is not part of this stage.
Holding you back
- Nothing yet — play a session first.
Moving on
Sync across your devices
Optional. Sign in with your email and your progress follows you to your phone or another computer. No password — you get a link by email. Nothing you play is ever uploaded, only the numbers.
Signed in as .
Your data
Everything lives in this browser only. Nothing is uploaded anywhere. Export it if you want a backup or want to move machines.