The Galaxy Watches, including the Watch 4, use a PPG sensor. The technology is very efficient at measuring your heart rate ...

In fact, the company assured shoppers that the device would be Google’s most accurate heart rate running watch to date. After reviewing it myself, I absolutely believe it. At rest and during ...

They observed that strong positive correlations between the Apple Watch Series 6 device and commercial oximeters when evaluating heart rate measurements and oximetry measurements. The Apple Watch ...