Circular Ring 2
An ambitious no-subscription smart ring with on-device ECG and AFib detection and a lightweight build, held back by a cluttered, buggy companion app.
3.2 / 5
★★★★★ ★★★★★ Mixed
Strengths
- On-device ECG with AFib detection - rare at this price
- No mandatory subscription; all features included
- Lightweight, well-built design with a charging case
Watch outs
- Companion app is cluttered, buggy and slow to sync
- Kira+ AI health coach feels clunky and half-finished
- Promised blood-pressure and glucose trend features still unavailable
£280
Typical price - check Circular for live pricing.
- Form factor Ring (inner-face sensors)
- Weight Lightweight - comparable to a wedding band
- Battery life Around 6 days typical; up to ~8 days in performance mode
- Charging Charging case included
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By Editorial team1 min read
- Form factor
- Ring (inner-face sensors)
- Weight
- Lightweight - comparable to a wedding band
- Battery life
- Around 6 days typical; up to ~8 days in performance mode
- Charging
- Charging case included
- Health features
- ECG with FDA-cleared AFib detection, heart rate, sleep, activity, SpO2
- Announced but not yet live
- Blood-pressure and blood-glucose trend estimates (teased for early 2026)
- Subscription
- None - all core features included
- Price
- From around £280 (Black); £360 Silver; £440 Gold/Rose Gold
- Pricing as of
- June 2026