Smart Ring™ • Health & Sleep Tracker
Your health, sleep and activity — tracked quietly from your finger.
“I'm in love with this ring! On top of everything it does, it's beautiful and goes with all my favorite outfits and nails.” — Ashley J., Scottsdale, AZ
Big insights. Barely there.
Slim, light and discreet. Designed to be worn like jewelry — day and night, without a bulky screen on your wrist.
Follows your heart rate, HRV, blood oxygen, temperature and stress, so you can see how your body is really doing.
Up to 15 days of battery on a single charge, so it keeps up with your whole week and beyond, not just your day.
Everything in one app
A clearer picture of your wellbeing
Your ring syncs with the free app on iPhone and Android, turning each night and day into simple, easy-to-read insights.
Frequently asked questions
How often do I need to charge it?
Up to 15 days per charge, depending on settings and use. Simply place it on the magnetic charging dock.
How do I choose the right size?
Use our size guide to measure your finger. The ring should feel snug but comfortable, and slide over your knuckle with a little resistance.
Is there a monthly subscription?
No. The app is free to use, with no monthly fees.
Does it work with iPhone and Android?
Yes — it pairs with iPhone and Android via Bluetooth through the free companion app.
Can I wear it in the shower or swimming?
Yes. It's water resistant to 5ATM, so it's fine for washing your hands, showering and swimming. Please avoid diving, saunas and hot tubs.
- Smart ring
- Magnetic charging dock
- USB-C cable
- User guide
Technical specifications
Sensors
- Optical heart-rate sensor (HR & HRV)
- Blood-oxygen (SpO₂) sensor
- Skin-temperature sensor
- 3-axis accelerometer for steps & sleep
Compatibility
- iOS and Android
- Free companion app
- Bluetooth Low Energy
Design
- Round, screen-free design
- Lightweight for all-day and overnight wear
Battery
- Up to 15 days per charge
- Magnetic charging dock
Materials & durability
- Stainless steel shell
- Water resistant to 5ATM
- CE certified
Sizes & colors
- Colors: Black, Silver, Gold, Deep Rose
- Sizes: see size guide
* Battery life depends on ring size, settings and use. This is a wellness device and is not intended to diagnose, treat or prevent any medical condition.
What our customers say
Michael J., Austin, TX✓ Verified
I'm impressed by how well it works for the price. It took me a little while to find the right finger (and you need to make sure it's facing the right way for the sensors to work), but now it's doing a great job of tracking my steps and distance — which is why I bought it — and even monitoring my sleep.
Emily T., Denver, CO✓ Verified
I've only had the ring for two days, but so far I'm really impressed! The quality is surprisingly good and the gold color is perfect. I was quite surprised by how well it works — the readings match my Apple Watch. I love the app too. 10/10! I hope it lasts.
James L., Charlotte, NC✓ Verified
It does exactly what it says, and sometimes I forget I'm even wearing it. Really good value for the price. I liked it so much I bought two more — one for my wife and one for my daughter.
Linda M., Portland, OR✓ Verified
Really good for the price. I compared it with an Apple Watch and, so far, the step count and sleep tracking are fairly accurate. The battery has lasted really well — a few days now on one charge. Delivery was very quick too.
Robert S., Columbus, OH✓ Verified
I have to say I'm extremely impressed! It even came with a charging case, so I can charge it anywhere during a quick break without carrying cables around. I'd recommend it to anyone looking for a great-value smart ring — it's the ideal choice.
Jessica B., San Diego, CA✓ Verified
Very good — it tracks everything accurately, except calories on an exercise bike, but apart from that it's really impressive for the price. CHECK YOUR FINGER SIZE FIRST!
Find your ring size
Enter your finger circumference
Wrap a strip of paper around the base of your finger, mark where it overlaps, then measure the length with a ruler in millimetres.
Your recommended size:
That measurement is outside our size range. Please measure again, or check the size chart.
Between two sizes? Choose the smaller one — the ring needs a snug fit to measure accurately.
| US / CA size | UK / AU size | Circumference | Diameter |
|---|---|---|---|
| 7 | O | 55 mm | 17.5 mm |
| 8 | P½ | 57.5 mm | 18.3 mm |
| 9 | S | 60 mm | 19.1 mm |
| 10 | T½ | 62.8 mm | 20 mm |
| 11 | V½ | 65.3 mm | 20.8 mm |
| 12 | X½ | 67.9 mm | 21.6 mm |
| 13 | Z+½ | 70.3 mm | 22.4 mm |
| 14 | Z+3 | 72.8 mm | 23.2 mm |