iHealth Labs
iHealth Air PO3M
$69.99
Best Pulse Oximeters · head-to-head
iHealth Air PO3M vs Contec CMS50D
A sourced, side-by-side comparison. Contec CMS50D is cheaper at $8.99. Every spec and price links to its source.
Contec Medical Systems
Contec CMS50D
$8.99Cheaper
Which is better: the iHealth Air PO3M or Contec CMS50D?
On the specs we track, they're closely matched. The Contec CMS50D is the cheaper at $8.99.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | iHealth Air PO3M | Contec CMS50D |
|---|---|---|
| US price | $69.99 | $8.99 |
| Brand | iHealth Labs | Contec Medical Systems |
| Released | — | — |
| Spo2 range | 70-99% | 0-100% |
| Spo2 accuracy percent | ±2% (70-99%) | ±2% (70-100%); ±4% under weak/low-perfusion signal conditions |
| Pulse rate range bpm | 30-250 bpm | 30-250 bpm |
| Display type | Bright LED numeric display | LED display |
| Perfusion index | — | No |
| Continuous monitoring | No | No |
| Bluetooth | Yes | No |
| Battery life hr | — | 24 |
Sources — iHealth Air PO3M: support.ihealthlabs.com (verified 2026-08-01). Contec CMS50D: contecmedsystems.com (verified 2026-08-01).
What's the difference between the iHealth Air PO3M and Contec CMS50D?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- Spo2 range: iHealth Air PO3M 70-99% vs Contec CMS50D 0-100%
- Spo2 accuracy percent: iHealth Air PO3M ±2% (70-99%) vs Contec CMS50D ±2% (70-100%); ±4% under weak/low-perfusion signal conditions
- Display type: iHealth Air PO3M Bright LED numeric display vs Contec CMS50D LED display
- Bluetooth: iHealth Air PO3M true vs Contec CMS50D false