Meet RHYTHM RING — the first wearable that actually understands shift work. It tracks the light around you and tells you when to block it or seek it — so you can finally sleep when you need to.
OF NIGHT SHIFT NURSES SLEEP POORLY*
MOST FIXABLE CAUSE:
LIGHT TIMING
WEARABLES DESIGNED FOR SHIFT WORK
*Frontiers in Neuroscience, 2021 – n=512, PSQI > 5 • Light as most modifiable factor: Boivin et al., Journal of Biological Rhythms, 2022
Based on peer-reviewed circadian research
Algorithms built for irregular schedules
Not another 9-to-5 wearable
WHY RHYTHM RING?
Your circadian rhythm is the 24-hour internal clock that tells your body when to sleep, wake, and stay alert. Light is its primary input — and for shift workers, the light you’re getting is almost always at the wrong time. Rhythm Ring fixes that.
Other wearables tell you to ‘get morning light’ at 7 AM — right when you’re trying to fall asleep after a 12-hour night shift. Rhythm Ring flips the script. Enter your schedule once, and every recommendation adjusts to YOUR morning, whenever that is.
The drive home after nights is the silent sleep killer. Bright sunlight at 7 AM tells your brain it’s time to wake up — right when you need to wind down. Rhythm Ring alerts you before you walk outside: ‘Put on your blue-blockers now.’ One small action, hours of better sleep.
No PhD required. Your Circadian Score (0-100) tells you one thing: how well your light exposure matched your schedule today. Check it in 10 seconds between patients. Over time, you’ll see what’s helping — and sleep will follow.
THE APP
Your daily score, light timeline, and personalized tips — designed to be useful in 30 seconds between patients, not a science project.
7p-7a nights, rotating 4-on-3-off, 12-hour blocks — whatever your pattern, enter it once. Everything adjusts to your schedule, not the other way around.
The ring quietly tracks the light around you all day. No buttons to press, nothing to log. It just works.
Walking to the parking garage at 0700 after a night shift? You'll get an alert: "Block light now." It tells you exactly what to do, right when you need it.
Check your daily score. See what's helping and what's not. Over time, the pattern becomes clear — and so does your sleep.
There are 15 million shift workers in the US — nurses saving lives at 3 AM, paramedics on 48-hour rotations, engineers managing mission-critical equipment through the night. All relying on wearables whose sleep algorithms were trained on people who go to bed at 10 PM. We built Rhythm Ring because the science for shift-worker circadian health exists. It's peer-reviewed and proven. But no product has ever actually used it. Until now.
We're inviting nurses, ER doctors, and shift workers to a free 14-day guided program. No ring required yet — just follow the same light timing method Rhythm Ring will automate. See how small changes to your light habits can change how you sleep. Participants get early access, priority pricing, and a say in shaping the product.
Apply to Join the ChallengeUnlike other rings and trackers that only measure internal data, Rhythm is the first wearable to measure your light environment — the most important signal for your circadian rhythm, energy, mood, and sleep.
Light is your body’s master clock setter. Without enough morning light, your energy crashes. Too much blue light at night, and your sleep suffers. Rhythm Ring helps you become aware of these light patterns so you can optimize your entire biological rhythm.
RHYTHM is not a replacement — it’s a missing layer. If you already wear another device, RHYTHM complements it by tracking what they don’t: your ambient light, behavior cues, nutrition, and how your environment affects your body in real time.
Yes. The Rhythm Ring is a one-time hardware purchase. While we normally offer a $5/month subscription for full access to the AI coaching platform, this fee is waived for all pre-orders.