A practice room that fits in a browser tab

Your band
in your pocket.

Load a chord chart, count in the band, and play along. Record yourself and hear it loop back. Nothing to install, no samples to download.

Four ways to play

Import a score and play it note by note. The app waits for you, or plays the other hand while you take yours.

Chords and a band that doesn't get tired. Drums, bass and keys keep going while you work out what to play over them.

The same chart and band, with every chord shape drawn out and a strum to follow.

Guitar, ukulele, violin, cello, viola and bass — with alternate tunings and an adjustable reference pitch.

“You don't learn a song by reading about it. You learn it by playing it a thousand times.”

Starts instantly. The band is synthesised as it plays, so there is nothing to load.
Works offline. Once it's open, you don't need a connection.
Hear yourself. Record a take and listen back over the band.

Jammer is in early testing. Leave your email and we'll tell you when it's ready.