Ultrahuman
Ultrahuman Ring AIR
$349
Released 2023-09
Best Fitness Trackers · head-to-head
Ultrahuman Ring AIR vs Xiaomi Smart Band 9
A sourced, side-by-side comparison. Ultrahuman Ring AIR is cheaper at $349. Every spec and price links to its source.
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Xiaomi
Xiaomi Smart Band 9
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Ultrahuman Ring AIR | Xiaomi Smart Band 9 |
|---|---|---|
| US price | $349 | — |
| Brand | Ultrahuman | Xiaomi |
| Released | 2023-09 | — |
| Form factor | ring | band |
| Display | — | AMOLED 1.62in |
| Battery days | 6 | 21 |
| Gps | No | No |
| Spo2 | Yes | Yes |
| Ecg | No | No |
| Subscription required | No | No |
| Water resistance (m) | 100 | 50 |
| Release | 2023 | — |
Sources — Ultrahuman Ring AIR: androidcentral.com (verified 2026-06-15). Xiaomi Smart Band 9: mi.com (verified 2026-07-08).
What's the difference between the Ultrahuman Ring AIR and Xiaomi Smart Band 9?
Where the two actually differ on the specs we track (3 of 8). Matching specs are omitted.
- Form factor: Ultrahuman Ring AIR ring vs Xiaomi Smart Band 9 band
- Battery days: Ultrahuman Ring AIR 6 vs Xiaomi Smart Band 9 21
- Water resistance (m): Ultrahuman Ring AIR 100 vs Xiaomi Smart Band 9 50
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Ultrahuman Ring AIR
Two whitelisted testers (TechRadar, Tom's Guide) wore the Ring Air for a month and 60 days respectively, both benchmarking it against Apple Watch and Oura. Both praise its featherweight comfort, detailed data and no subscription; both flag easy scratching. Verdicts converge: a capable, data-heavy ring for enthusiasts. No RTINGS lab data exists. (2 sourced reviews, 2 lab-tested.)
Praised: Extremely lightweight (2.4-3.6g) and comfortable, even for sleep; Heart-rate/steps/sleep data tracks closely with Apple Watch and Oura references; No mandatory subscription to view your data.
Flagged: Scratches easily, especially the matte black finish, within weeks; Overwhelming volume of data; app less user-friendly than Oura; No screen means you must open the app for everything.
Xiaomi Smart Band 9
No sourced tester review yet.