CIRCA Smart Ring

Know your rhythm.

Shop Now

Introducing CIRCA

A 2.9-gram ring that tracks heart rate, blood oxygen, sleep and steps.

$0 monthly. No subscription. The app is free.

CIRCA syncs to the free QRing app on iPhone and Android. No membership, no monthly fee.

CIRCA smart ring
CIRCA smart ring

Shown in glossy black

Health tracking
that disappears

CIRCA smart ring
CIRCA smart ring

No screen, no strap, no buzzing. Sensors inside the band read heart rate, blood oxygen and sleep, day and night.

  • 2.9g

    Featherlight

    No screen, no strap

  • 5–7 days

    Battery life

    Per charge (maker rated).

  • 30 days

    Money-back guarantee

    Not for you? Send it back for a full refund.

5–7 days of battery life per charge.

5 to 7 days per charge (maker rated). A portable charging case comes in the box.

CIRCA smart ring

No screen. No strap.
No buzzing.

Glossy black, gold or silver. US sizes 7 to 13.

Everyday health tracking

Sleep

  • Sleep duration

    See how long you slept, every morning.

  • Sleep quality

    A simple read on how well you slept, in the QRing app.

  • Stays on at night

    A plain 2.9-gram band is easier to sleep in than a watch.

CIRCA smart ring

Technical specifications

Sensors

  • Heart rate sensor
  • Blood oxygen (SpO2) sensor
  • Motion sensor for steps, distance, calories and sleep

Compatibility

  • iOS 8.0 or later and Android 5.1 or later
  • Free QRing app, no subscription
  • Bluetooth

Weight and dimensions

  • Weight: 2.9 grams
  • Width: 6.8 mm

Battery life

  • 5 to 7 days per charge (maker rated)
  • Portable charging case included

Finishes and sizes

  • Glossy black, gold or silver
  • US sizes 7 to 13
  • Size exchange within 30 days

Care

  • Not rated for water: remove before showering or swimming
  • Not a medical device. For general wellness and fitness.

What's included

  • CIRCA ring
  • Portable charging case
  • USB charging cable
  • User manual

The honest comparison

How CIRCA compares

CIRCA
Other smart rings
Off-brand rings
Price
$69.99
$299 and up
$50 to $70
Monthly subscription
None
Up to $6 a month on some
None
Charging case
Included
Charger included
Often sold separately
Warranty
12 months
12 months
30 days to 12 months
Wrong size
Exchanged within 30 days
Varies
Varies
US shipping
Free
Varies
Often extra

The other columns show typical publicly listed prices and policies for popular smart rings in October 2026, not any single product.

Shop Now

Choose your finish

US sizes 7 to 13. Free US shipping. 30-day money-back guarantee.

Shop Now

Frequently asked questions

How do I find my size?

US sizes 7 to 13. Measure the inside of a ring you already wear on the same finger and match it to the size guide. Between sizes, go up one. Wrong size? We exchange it within 30 days.

Which phones does it work with?

iPhones on iOS 8.0 or later and Android phones on 5.1 or later, over Bluetooth, through the free QRing app.

Is there a subscription?

No. The QRing app is free and there is no monthly fee.

How long does the battery last?

5 to 7 days per charge (maker rated). The portable charging case in the box tops the ring up on the go.

Can I shower or swim with it?

It is not rated for water by the maker, so take it off before showering, swimming or washing up.

Is this a medical device?

No. Heart rate, blood oxygen, sleep and activity readings are for general wellness and fitness, not for diagnosis or treatment.

What if it does not fit or I do not like it?

Send it back within 30 days for a full refund. It also comes with a 12-month warranty against defects.

Something else? Read the full FAQ or get in touch.