Best smartwatches that can measure blood oxygen saturation levels


Your body’s blood oxygen levels serve as a warning sign of sleep apnea, trouble adjusting to high altitudes, or even serious pulmonary medical conditions. Finger-based pulse oximeters are the most accurate for spot readings, but uncomfortable for sleep tracking. And you won’t know if you need one unless you do some long-term monitoring first. That’s where smartwatches with SpO2 tracking come in.

Blood oxygen monitoring is increasingly common on smartwatches these days. But not all pulse oximetry sensors are created equal, and many watches are limited on when (or how often) you can take readings. Continuous SpO2 tracking is rare to find, and burns through battery life quickly. And of course, Apple Watch owners will need to look elsewhere, due to its legal issues with SpO2 readings.




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