Circular Ring 2
#5 in Smart Ring · Rated 4.1
ECG-enabled smart ring with FDA-cleared AFib detection
Circular Ring 2 is Circular’s CES 2025-refresh, offering FDA-cleared ECG, AFib detection, SpO2, and a more refined titanium shell with eight-day battery life. The brand emphasizes a subscription-free model, with digital ring sizing via a smartphone camera and a redesigned app experience focused on AI-driven wellness guidance. Availability broadened beyond initial markets, with international rollout and crowdfunding-backed pricing. While it trades on premium materials and health features, some reviewers note app stability and data-sync variability. ([techcrunch.com](https://techcrunch.com/2025/01/05/circular-unveils-its-next-gen-ring-2-with-ecg-functionality-and-afib-detection-at-ces-2025/?utm_source=openai))
Features
- ECG and FDA-cleared AFib detection
- 8-day battery life
- AI health coach (Kira)
- Digital ring sizing via smartphone
Pros
- Strong ECG/AFib capabilities
- No subscription required
- OS-agnostic (iOS/Android)
Cons
- App reliability can be variable
- Higher price vs. some rivals