It appears Apple’s bet to pack a bespoke heart rate sensor into Apple Watch instead of off-the-shelf technology paid off, as Cleveland Clinic researchers recently found the wearable to be the most accurate wrist-worn fitness tracker on the market.
The study, which pitted Apple Watch against competitors Fitbit Charge HR, Mio Alpha and Basis Peak, found significant discrepancies between the variance between the consumer devices, reports Time.
Testing involved 50 subjects who were hooked up to an electrocardiogram while walking, running and at rest. Results were compared to to heart rate data from the consumer devices, with Apple Watch showing a 90 percent accuracy rate in most scenarios. The others dropped into the “low 80s,” according to Dr. Gordon Blackburn, director of cardiac rehabilitation at Cleveland Clinic.