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Circular

Circular Ring 2

Specs not independently verified
Starting at$299

Design score

8.8/10

How we score →
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Design & Build8.8
Circular Ring 2
StatusSpecs Pending

Verdict

A smart ring with native ECG and no subscription, aimed at the European market.

Where it wins, where it doesn't

Pros

  • Native ECG sensor for AFib detection
  • No subscription — a saving that compounds over years
  • Haptic notifications on the ring itself

Cons

  • Finish and industrial design trail the Oura Ring 4
  • Data interpretation less mature than Oura's
  • Global support network still being established
Ideal forBuyers who refuse subscription hardwareAnyone monitoring for arrhythmiaBiohackers wanting raw data without a recurring fee

Editorial note

Two decisions make this interesting. The first is native ECG for atrial fibrillation detection, which moves the ring out of wellness-tracker territory and towards something with a clinical use case. The second is the absence of a monthly fee — the smart-ring category has normalised charging a subscription to read sensors you already paid for, and refusing that is a straightforward argument in the buyer's favour. Over the life of the device it is the difference of a few hundred pounds. What Circular does not yet match is Oura's finish and its data interpretation, which is where years of iteration show. Global support and service are also still being established, which matters more for a device you wear continuously than for one that sits on a desk.

In-Depth Review

Two decisions make the Circular Ring 2 interesting. Native ECG for atrial-fibrillation detection moves it out of wellness-tracker territory toward something with a clinical use case. And the absence of a monthly fee refuses the norm the category has settled into — charging a subscription to read sensors you already bought. Over the life of the device that is a difference of a few hundred pounds.

Where it trails Oura

Finish and industrial design are a visible step below the Oura Ring 4, and data interpretation is less mature — years of iteration show in how well Oura explains what a number means. Circular's global support and service network is also still being built out, which matters more for a device worn continuously than one that sits on a desk.

The upside

Haptic notifications on the ring itself, raw data without a recurring fee, and an ECG sensor most rivals at this size do not have.

Who should buy

Buyers who refuse subscription hardware, anyone monitoring for arrhythmia, and biohackers who want the raw data. If you want the most polished ring and the best coaching layer, Oura is still that.

Frequently Asked Questions

Who is Circular Ring 2 for?↓
Circular Ring 2 is a fit for buyers who refuse subscription hardware, Anyone monitoring for arrhythmia and Biohackers wanting raw data without a recurring fee.
What are the drawbacks of Circular Ring 2?↓
The trade-offs we record are: Finish and industrial design trail the Oura Ring 4, Data interpretation less mature than Oura's and Global support network still being established.
What does Circular Ring 2 do well?↓
Native ECG sensor for AFib detection, No subscription — a saving that compounds over years and Haptic notifications on the ring itself.
How much does Circular Ring 2 cost?↓
$299, as recorded in this index. Prices move; check the retailer for the current figure.
What is the Fathom Layer design score for Circular Ring 2?↓
Circular Ring 2 scores 8.8 out of 10. The score is assigned by a human against published criteria and placement is never sold — see the methodology page for how it is built.

Further reading

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