Study Shows That the Galaxy Watch 4 SpO2 Sensor is Comparable to Medical Tools
Galaxy Watch 3 stands out from the rest
Samsung Galaxy Watch 4 Study Shows its SpO2 Blood Oxygen Sensor is Impressively Accurate | iTech Post
Google Pixel Watch gains support for SpO2 (blood oxygen saturation) tracking
Pulse Oximeter vs SpO2 monitor in Smartwatches: Blood Oxygen Track Reliability, Which One Should You Buy in COVID-19 times, Should you rely on smartwatches to measure blood oxygen,