249+ iOS apps curated and reviewed
Blood Oxygen | O2 Monitor app+ is the household name in oxygen level tester, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.6★ (425) | No | Yes | Oct 2026 | |
| 2 |  | Free | 3.9★ (193) | No | Yes | Oct 2026 | |
| 3 |  | Free | 4.5★ (8) | No | No | May 2026 | |
| 4 |  | Free | 4.1★ (474) | Yes | Yes | Oct 2026 | |
| 5 |  | Free | 4.3★ (2K) | Yes | No | Oct 2026 | |
| 6 |  | Free | 3.8★ (746) | No | No | Oct 2026 | |
| 7 |  | Free | 4.8★ (238) | Yes | No | Oct 2026 | |
| 8 |  | Free | 5.0★ (2) | No | No | May 2026 |
Track your blood oxygen saturation (SpO2) and pulse rate daily. Log readings from your oximeter, monitor your normal range, and stay informed about your health. Features include a log diary, multi-profile support, and Apple Health synchronization.
Track your blood oxygen saturation levels and monitor changes over time. Log additional symptoms to gain a more comprehensive understanding of your condition. Supports multiple user profiles and synchronizes with HealthKit for pulse and oxygen data.
Calculates remaining oxygen in a cylinder for ambulatory users. Input device, liter flow, and cylinder size for precise remaining hours and minutes. Provides peace of mind for oxygen users on the go.
