Wellue (Viatom)
Wellue O2Ring
$152.9Cheaper
Best Pulse Oximeters · head-to-head
Wellue O2Ring vs Nonin Onyx Vantage 9590
A sourced, side-by-side comparison. Wellue O2Ring is cheaper at $152.9. Every spec and price links to its source.
Nonin Medical
Nonin Onyx Vantage 9590
$199
Which is better: the Wellue O2Ring or Nonin Onyx Vantage 9590?
On the specs we track, they're closely matched. The Wellue O2Ring is the cheaper at $152.9.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Wellue O2Ring | Nonin Onyx Vantage 9590 |
|---|---|---|
| US price | $152.9 | $199 |
| Brand | Wellue (Viatom) | Nonin Medical |
| Released | — | — |
| Spo2 range | 70-100% | 0-100% |
| Spo2 accuracy percent | ±2% (80-100%), ±3% (70-79%) | 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%) |
| Pulse rate range bpm | 30-250 bpm | 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion) |
| Display type | On-ring digital display with app-adjustable brightness | Numeric LED display with tricolor pulse-quality indicator |
| Perfusion index | — | No |
| Continuous monitoring | Yes | No |
| Bluetooth | Yes | No |
| Battery life hr | 16 | 36 |
Sources — Wellue O2Ring: getwellue.com (verified 2026-08-01). Nonin Onyx Vantage 9590: nonin.com (verified 2026-08-01).
What's the difference between the Wellue O2Ring and Nonin Onyx Vantage 9590?
Where the two actually differ on the specs we track (7 of 8). Matching specs are omitted.
- Spo2 range: Wellue O2Ring 70-100% vs Nonin Onyx Vantage 9590 0-100%
- Spo2 accuracy percent: Wellue O2Ring ±2% (80-100%), ±3% (70-79%) vs Nonin Onyx Vantage 9590 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%)
- Pulse rate range bpm: Wellue O2Ring 30-250 bpm vs Nonin Onyx Vantage 9590 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion)
- Display type: Wellue O2Ring On-ring digital display with app-adjustable brightness vs Nonin Onyx Vantage 9590 Numeric LED display with tricolor pulse-quality indicator
- Continuous monitoring: Wellue O2Ring true vs Nonin Onyx Vantage 9590 false
- Bluetooth: Wellue O2Ring true vs Nonin Onyx Vantage 9590 false
- Battery life hr: Wellue O2Ring 16 vs Nonin Onyx Vantage 9590 36