Stillness · research app
Breathe with the light.
A few minutes. The light slows, you follow, and the noise thins out.
Sound on. Camera frames and body measurements stay on this device.
The research behind the light
An open research app exploring how light and sound can guide a slower breath. Stillness has not been clinically validated and is not a medical device.
- Cyclic sighing: a trial of five minutes of daily practice over a month informed the opening breaths.
- Slow breathing and its limits: a 400-person trial found no added benefit of 5.5 over 12 breaths a minute for its main stress outcome.
- Light as a breathing cue: a laboratory study explored a visual pacer; it did not test this app.
Camera readings are experimental estimates. A clear signal is not proof of accuracy or a measure of calm. Breathe comfortably; pause if following the pace feels uncomfortable.
Read the original article (then called Relief) · Inspect the source
Read the Stillness research series:
- Six breaths a minute is a starting point
- A light you can breathe with
- A camera can estimate a pulse, not a feeling
Background on Wikipedia: breathing and photoplethysmography. These explain the concepts; they are not endorsements of Stillness.
Product analytics count visits, sessions and sharing. Camera frames, pulse, breath estimates and felt-state responses are not sent to PostHog. Aggregate calibration summaries stay in this browser.