← All devices 
Clinical / medical-grade · Ring · by Sky Labs
Sky Labs CART BP
A cuffless 24-hour blood-pressure ring — in Korea’s hypertension guidelines, but not FDA-cleared or sold in the US.
September 2025Sky Labs CART BP
Fresh in cycle9 mo old
Part of the Sky Labs CART platform, alongside CART-I (continuous AFib detection).
API access: No Raw data access: Yes — restricted Open source: No public repo
Clinical value
60/100
Korea-approved cuffless BP
Empowerment
34/100
App-only, not US-available
Everyday value
52/100
24h BP ring, Korea-only
A ring that measures cuffless 24-hour blood pressure, including during sleep, and is approved in Korea — where its clinical sibling became the first ring BP monitor written into hypertension guidelines. It is not FDA-cleared and not officially sold in the US.
What it measures
Cuffless, continuous 24-hour blood pressure (including overnight), with AFib-detection lineage from the related CART-I ring.
Regulatory status
Approved by Korea’s MFDS (consumer and clinical models); the clinical CART BP pro is in the 2026 Korean hypertension guidelines. EU CE marking is in preparation. Not FDA-cleared in the US.
Validation & accuracy
The CART-I sibling outperformed the Apple Watch for AFib sensitivity in a UK study (Heart Rhythm O2); a CART BP validation trial is registered (NCT06513975). Omron has invested in Sky Labs.
Data control & export
Raw data: restricted — app-based trend viewing and SDK integration into partner platforms, with no consumer-facing open API or CSV. API: none for consumers.
Wearability & battery
A ring that takes blood pressure around the clock, including during sleep — a major comfort advantage over a cuff. But it is sold only through Korean channels.
Cost & access
Roughly $390 in Korea. No subscription documented.
Who it serves
Patients (currently in Korea) who want clinic-grade ambulatory blood pressure without a cuff.
Who is left out or burdened
US patients cannot buy it officially; no FDA clearance; data is app-locked with no open export.
✓ Strengths
- Cuffless 24-hour blood pressure, including during sleep
- Korea MFDS-approved; clinical model in hypertension guidelines
- AFib-detection lineage with strong study data
- Backed by Omron investment
✕ Weaknesses
- Not FDA-cleared and not officially sold in the US
- Cuffless BP accuracy remains debated
- App-locked data; no open export or API
- EU CE marking still pending
60
Why this clinical score. Genuinely capable cuffless 24-hour BP with guideline recognition in Korea, but no US FDA clearance or availability — and cuffless BP accuracy remains debated — hold it mid-axis.
34
Why this empowerment score. App-locked data, no open export or US availability make it one of the least empowering devices here for a US patient.
52
Why this everyday score. A comfortable around-the-clock BP ring, but only obtainable through Korean channels.
Latest news
Reviews & coverage
Reviewers find the cuffless BP ring concept compelling for effortless, continuous readings. They stress it still requires calibration and broader independent validation before replacing a cuff.
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.