Your health,
on one finger.
The Smart Ring Fitness Tracker reads your heart rate and blood oxygen around the clock, packed into a 4.4g stainless steel band so slim you'll forget you're wearing it.
- Heart rate & SpO₂ sensors
- Feather-light 4.4g
- No screen, no strap, no buzzing
- Durable stainless steel
Why it's different
All the insight of a smartwatch. None of the bulk.
Your finger is one of the best spots on your body to read your pulse. The ring sits there quietly and does the work, with no screen to check and no strap to sweat under.
Heart rate
An optical sensor on the inside of the band follows your pulse through workouts, workdays and rest.
Blood oxygen
Check your SpO₂ reading in the companion app, a key sign of how well your body is recovering.
4.4g featherweight
Lighter than a coin and just 2.7mm thick, comfortable enough to wear 24/7, even to bed.
Built tough
A polished stainless steel shell handles barbells, commutes and everyday knocks, and still looks sharp.
2.7mm
Slimmer than most wedding bands
Made for movers
Built for the workout. Light enough to forget.
No straps slipping mid-set, no screen lighting up in the dark. Slip it on in the morning and let it keep track while you lift, run, work and recover.
4.4g
Total weight
24/7
Wearable comfort
0
Distracting screens
Ring vs. watch
Why people are ditching the wrist.
Take a closer look
Every detail, up close.
Simple from day one
Up and running in three steps.
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1
Find your fit
Use our quick paper-strip method to measure your finger in under a minute.
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2
Slip it on
Wear it on your index or middle finger with the sensor on the palm side for the best readings.
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3
See your data
Pair it with the companion app on your phone and watch your heart rate and SpO₂ trends build day by day.
The upgrade people don't take off.
"I stopped wearing my watch to the gym. The ring doesn't catch on the bar and I genuinely forget it's on."
"Looks like a sleek steel band, so it goes with everything. Checking my blood oxygen in the app is super easy."
"Bought one for me and one for my partner. No more bulky trackers at night. Best gadget buy this year."
Questions, answered.
How do I find my ring size?
Wrap a thin strip of paper around your finger, mark where it meets and measure the length. That's your circumference. Match it in our . This listing is a size 8 (18.1mm inner diameter, 56.9mm circumference).
What does the ring track?
The built-in optical sensor tracks your heart rate and blood oxygen (SpO₂), and you view the readings in the companion app on your phone.
Is it comfortable to wear all day?
Yes. At 4.4g and 2.7mm thick it feels like a regular band. Most people forget they're wearing it within a day.
Is it a medical device?
No. The ring is a fitness and wellness tracker. Its readings are for personal reference and shouldn't be used for diagnosis or treatment.
Your next upgrade
Stop guessing. Start knowing.
Heart rate and blood oxygen insight in a ring you'll actually want to wear.
Smart Ring Fitness Tracker
$98.79
Find your perfect fit
This listing is size 8: 18.1mm inner diameter, 56.9mm circumference.