Google Fit Gains Heart Rate, Respiratory Rate Measurement via Camera

A forthcoming update to Google Fit will allow the app to measure heart rate and respiratory rate using only a phone's camera. The update will be available next month. The feature will be available first for Pixel phones, "with plans to expand to more Android devices." To measure respiratory rate, the camera looks at your head and upper torso to detect "tiny physical signals at the pixel level — like chest movements". To measure heart rate, the user places their finger on the camera lens so the app can measure "subtle changes in the color of your fingers". While the features "aren’t meant for medical diagnosis or to evaluate medical conditions", Google has completed "initial clinical studies" to validate the features.
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