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Clinical / medical-grade · Ring · by BodiMetrics
BodiMetrics Circul Pro
The only FDA-cleared ring pulse oximeter for consumers — clinically validated across skin tones, but single-purpose.
August 2023BodiMetrics Circul Pro
Maturing2 yr 10 mo old
API access: No Raw data access: Yes — restricted Open source: No public repo
Clinical value
72/100
FDA-cleared ring oximeter
Empowerment
58/100
Session download, no API
Everyday value
48/100
Worn for sessions, single-purpose
A ring pulse oximeter with a genuine FDA 510(k) clearance and peer-reviewed accuracy across skin tones — a standout among rings, but a single-purpose SpO2/heart-rate device rather than an all-day tracker.
What it measures
Continuous blood oxygen (SpO2) for up to ~12 hours, heart rate, and basic sleep, via a sensor on the palmar finger surface.
Regulatory status
FDA 510(k)-cleared as a pulse oximeter (K221361, Class II) — marketed as the only FDA-cleared ring oximeter available to consumers. A real clearance, not wellness-only.
Validation & accuracy
A peer-reviewed study (Mayo Clinic Proceedings: Digital Health) found accurate SpO2 across all skin tones — notable given documented fingertip-oximeter bias on darker skin.
Data control & export
Raw data: restricted — a free cloud portal lets you view, print, and download session data, but there is no true open raw export or developer API. API: none.
Wearability & battery
A ring worn for measurement sessions (up to ~12 hours) rather than continuously; recharged between sessions. Single-purpose.
Cost & access
One-time (roughly $200–$300 for consumer models). No subscription.
Who it serves
People who need clinically credible, skin-tone-equitable blood-oxygen tracking — e.g., for nocturnal hypoxemia or sleep-apnea screening.
Who is left out or burdened
Single-purpose SpO2 device; limited export; not an all-day lifestyle tracker.
✓ Strengths
- Genuine FDA 510(k) clearance as a pulse oximeter
- Peer-reviewed accuracy across all skin tones
- No subscription
- Continuous SpO2 for ~12 hours with session reports
✕ Weaknesses
- Single-purpose SpO2/HR device, not an all-day tracker
- No true raw export or developer API
- Worn for sessions; recharge between uses
- Limited everyday/smart features
72
Why this clinical score. A genuine FDA clearance plus peer-reviewed, skin-tone-equitable accuracy put it well up the clinical axis — capped below multi-metric CGMs/BP because it is a single-purpose oximeter.
58
Why this empowerment score. Session download and printing help, and there is no subscription, but the lack of true raw export or an API holds empowerment mid-range.
48
Why this everyday score. Worn for sessions rather than all day, screenless and single-purpose — low everyday breadth despite its clinical strength.
Latest news
Reviews & coverage
Reviewers see the Circul ring as a budget overnight SpO2/HR monitor useful for spotting possible apnea patterns. Accuracy is described as adequate for screening but below medical oximeters.
Summary is a draft synthesis of public coverage, not an endorsement. Links open a search of each outlet.
Reddit communities
Independent user communities where this device (or its category) is discussed.
Get it · manuals & support
Draft profile · public-source review, June 2026 · scores describe direction and degree, not buying advice. News, links, and prices change — verify with the manufacturer. Image is representative.