Sources & References
These references support the general wellness ranges and guidance shown in Blood Oxygen Tracker: SpO2.
General wellness, not medical care.The app is not a medical device and does not diagnose or treat any condition. These sources do not replace advice from a qualified healthcare professional.
Blood oxygen ranges
Thresholds
- NICE — COPD in over 16s: diagnosis and management (NG115)
- Global Initiative for Chronic Obstructive Lung Disease — 2025 GOLD Report
- American Thoracic Society — Pulse Oximetry
Measurement accuracy
Heart rate
- American Heart Association — All About Heart Rate (Pulse)
- American Heart Association — Target Heart Rates