Deep focus,
one tap away
Quell turns any moment into deep work: a 40 Hz binaural beat, a calm coach in your ear, and music made for focus. No setup, no account. Just press begin.
Everything you need to drop in
Sound, voice, and music designed to work together, so starting is the only decision you have to make.
On-device & private
Everything runs locally. Nothing about your sessions ever leaves your device.
No account, ever
No sign-up, no inbox, no password. Open it and begin in a single tap.
Everywhere you work
One focus experience across iOS, macOS, and the web, wherever you land.
Built on the science of focus.
Quell is grounded in real neuroscience. 40 Hz sits in your brain’s gamma band, the frequency tied to attention, working memory, and deep cognitive work. Quell generates it precisely as a binaural beat, drawing on neural entrainment: the way your brain naturally falls into step with an external rhythm. Every layer is engineered around the research, so you’re training focus by design, not by accident.
Your next deep-work
session starts now
Open Quell, put on your headphones, and press begin. That’s the whole ritual.
Be first to know
New features, the macOS launch, and the occasional focus tip. No spam, only what matters.