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Ultrahuman Ring Air
Subscription-free smart ring with PPG, SpO2 and temperature sensors, 4–6 day battery and 10 ATM water resistance — full feature set, no monthly fee.
4.0 / 5
☆☆☆☆☆
★★★★★
Pros
- No mandatory subscription — every current feature is included with the hardware purchase, unlike Oura, Whoop and several newer rivals
- Lightest mainstream smart ring on the market at 2.4 – 3.6 g, which makes it materially less intrusive in sleep
- 10 ATM water resistance covers swimming and showering without the cautious-wear advisories seen on some rivals
- Five finishes including Raw Titanium and Bionic Gold span the cheapest and most premium aesthetic options in the category
- PowerPlugs marketplace adds opt-in trackers (caffeine, AFib screening, cycle phase) without raising the base subscription
Cons
- Sleep-stage and HRV accuracy track Oura closely in independent comparisons but remain a step behind it for the most rigorous use cases
- Battery life is real-world 4 – 6 days rather than the marketing-page 6+ — most rivals overstate equally, but the gap to Oura's 4 – 7 day claim is small
- The Ultrahuman app's UI is denser and less polished than Oura's, with a steeper learning curve for first-time wearable users
- Premium finishes (Bionic Gold, Space Silver) command a £100 – £200 cosmetic premium identical to Oura's pricing ladder
- Active legal context — Oura has ongoing patent infringement litigation against Ultrahuman in the US and India (status reviewed below); buy with the caveat that the legal outcome could affect future US availability
Specifications
| Specification | Value |
|---|---|
| Form factor | Smart ring (continuous wear, dominant or non-dominant hand) |
| Material | Tungsten carbide outer shell with hypoallergenic inner layer |
| Weight | 2.4 g – 3.6 g depending on size and finish |
| Sizes | US 5 – 14 (sizing kit recommended) |
| Finishes | Aster Black, Matte Grey, Bionic Gold, Space Silver, Raw Titanium |
| Sensors | PPG (red and green LEDs), skin temperature, infrared, 6-axis accelerometer |
| Water resistance | 10 ATM (≈100 m) |
| Battery life | 4 – 6 days in typical use |
| Charge time | ≈ 2 hours to full |
| Connectivity | Bluetooth 5.2 |
| App support | iOS 15+ and Android 10+ |
| Subscription | None — all current features included with hardware purchase |
| Launch price (Aster Black) | £299 / $349 |
| Pricing as of | May 2026 |