Versus Engine
Circular Ring 2 vs Ultrahuman Ring Air
Specs, price and the one trade-off that actually decides it — Circular Ring 2 against Ultrahuman Ring Air, side by side.
Cheaper to start
Circular Ring 2
Starts about $50 lower.
Rated higher
Circular Ring 2
8.8 vs 8.2 on our design scale.
Standout
Circular Ring 2
Native ECG sensor for AFib detection
Circular Ring 2
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
Ultrahuman Ring Air
An ultra-lightweight smart ring designed for athletes and continuous glucose monitor integration.
Where it wins, where it doesn't
Pros
- Subscription-free model
- Actionable metabolic insights
- Incredibly light at 2.4g
Cons
- App interface can feel overwhelming
- External finish is prone to scratching