CIRCUL RING
CIRCUL RING 3
Preorder$299.00 $229.00 Save 23%
Tax included. Shipping is calculated at Shopify checkout.
★★★★★ 82 reviews
What’s new in CIRCUL 3.
A thinner titanium ring that adjusts through the day, then turns those readings into sleep, recovery, and breathing guidance.
A ring that adapts to you. The inner fit responds as your finger changes size.
Ultra-thin titanium. About 2.23 mm, made for all-day wear.
Body trends over time. Personal baselines for sleep, recovery, and stress.
HRV biofeedback breathing. Follow a guided rhythm and watch the response.
Not sure on size? One complimentary exchange within 30 days.
Buy Now opens CIRCUL checkout on Shopify. The paid order is written to the Shopify admin, then this server reports order_created for the ad click.
PRODUCT FEATURES
- Self-adaptive inner fit
- Sleep stages, overnight oxygen, and sleep debt
- HRV breathing coach
- Cuff-free blood pressure against your baseline
- Up to 7 days between charges
- 10 ATM water resistance
- No monthly subscription
SPECIFICATIONS
Titanium shell, about 2.23 mm. Sizes XS through XL. Optical sensing for heart, sleep, and recovery signals. App for iOS and Android.
RETURN POLICY
Size exchange within 30 days of delivery. Refunds follow the checkout store’s posted return window.
WARRANTY
Manufacturing defects are covered by the CIRCUL limited warranty handled through the Shopify order.
Made for the whole day, and the night.
The same ring stays on for sleep, training, and a two-minute breathing reset. No subscription required to see your data.
Comfort that adapts to the finger you have today.
Fingers change with heat, training, and sleep. CIRCUL RING 3 uses a bidirectional adaptive fit so the ring stays seated for sensing without a constant squeeze.
2.23 mm titanium profile
4 colors
XS–XL size range
Tech specs
Fit Self-adaptive inner band
Materials Titanium shell
Thickness About 2.23 mm
Battery Up to 7 days
Water 10 ATM
Sensing Optical heart, sleep, and recovery signals
Insights Sleep, stress, activity, cycle trends
Membership No required monthly fee
FAQ
Does the ring need a subscription?
No monthly fee is required to use the ring and see your measurements.
What if the size is wrong?
One complimentary size exchange is offered within 30 days. Measure before you order, then exchange if the fit is off.
Where is the order completed?
Buy Now creates a Shopify checkout for this variant. Payment, tax, and shipping finish there, and the paid order appears in the Shopify admin.
How are ads measured?
The landing URL keeps the ad click id. When Shopify confirms the paid order, this server sends a single order_created event with that click id. The same Shopify order id is reused if the notice is retried.
What 82 reviews keep coming back to
★★★★★
Sleep detail that is easy to check in the morning.
★★★★★
Light enough to wear overnight without noticing the band.
★★★★★
Breathing sessions that show a real-time HRV change.