# Oura Ring 4 vs Ultrahuman Ring AIR: specs and price compared

A sourced, side-by-side comparison of the Oura Ring 4 (Oura) and Ultrahuman Ring AIR (Ultrahuman) among smart rings. Oura Ring 4 is the cheaper of the two at $349.

## Side by side

| Spec | Oura Ring 4 | Ultrahuman Ring AIR |
| --- | --- | --- |
| US price | $349 | $349 |
| Brand | Oura | Ultrahuman |
| Released | 2024-10 | 2023-06 |
| Material | Titanium (non-allergenic inner and outer surfaces) | Titanium outer shell with tungsten carbide carbon coating; medical-grade hypoallergenic inner layer |
| Weight (g) | 3.3-5.2 | 2.4-3.6 |
| Battery days | 8 | 6 |
| Spo2 | Yes | Yes |
| Temperature sensor | Yes | Yes |
| Ecg | No | No |
| Subscription required | Yes | No |
| Water resistance (m) | 100 | 100 |

## Key differences

- Material: Oura Ring 4 Titanium (non-allergenic inner and outer surfaces) vs Ultrahuman Ring AIR Titanium outer shell with tungsten carbide carbon coating; medical-grade hypoallergenic inner layer
- Weight (g): Oura Ring 4 3.3-5.2 vs Ultrahuman Ring AIR 2.4-3.6
- Battery days: Oura Ring 4 8 vs Ultrahuman Ring AIR 6
- Subscription required: Oura Ring 4 Yes vs Ultrahuman Ring AIR No

## What reviewers say

**Oura Ring 4** — Four testers (Tom's Guide, TechRadar, Engadget, Digital Trends) all hands-on-tested the Oura Ring 4 and call it the best smart ring you can buy, praising the all-titanium comfort and companion app. Every source flags the mandatory ~$5.99/month subscription; easy scratching and step/calorie/activity-detection accuracy are the recurring doubts across reviews. (4 sourced reviews.)

**Ultrahuman Ring AIR** — Two whitelisted testers (TechRadar, Digital Trends) each wore the Ring Air hands-on for a full month in August 2023 and agree it is exceptionally light, comfortable to wear 24/7, accurate against wrist wearables in side-by-side testing, and free of any subscription. Both also flag that it scratches within weeks of gym/daily wear and packs in a lot of data to comb through, though they split on how usable the app is. (2 sourced reviews.)

## Sources

- Oura Ring 4: https://ouraring.com/store/rings/oura-ring-4 (ouraring.com, verified 2026-06-15)
- Ultrahuman Ring AIR: https://www.ultrahuman.com/ring/buy/global/ (ultrahuman.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/smart-rings/oura-ring-4-vs-ultrahuman-ring-air/
Cite: Per The Front Desk Review, Oura Ring 4 ($349) vs Ultrahuman Ring AIR ($349) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-rings/oura-ring-4-vs-ultrahuman-ring-air/
License: CC BY 4.0.