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
Tie
Both start at a similar price.
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
Specifications
- Battery8 days power mode, 5 days performance
- bestRating—
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- Charging30 minutes, wireless case
- ComplianceGDPR and HIPAA
- description—
- MaterialTitanium, hypoallergenic interior
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- SensorsECG, PPG, temperature, 3-axis accelerometer
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- Size2.55 mm thick, 7.8 mm wide, 3 g
- SizesUS 6-14
- Thickness2.55 mm
- Water ratingIP68
- Weight3 g
- worstRating—
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
Specifications
- Battery—
- bestRating5
- categoryWearable Technology
- Charging—
- Compliance—
- descriptionUltrahuman Ring AIR ® is the world's most comfortable and compact smart ring that monitors your sleep, movement and recovery.
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- nameUltrahuman Ring AIR
- price349
- priceCurrencyUSD
- priceValidUntil2026-12-15
- ratingValue4.7
- reviewCount2500
- sellerUltrahuman
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- shippingDestinationGLOBAL
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- worstRating1