MacRumors:

In a new study comparing the accuracy of seven different fitness trackers, the Apple Watch was found to have the lowest margin of error when measuring heart rate, beating the Basis Peak, Fitbit Surge, Microsoft Band, Mio Alpha 2, PulseOn, and Samsung Gear S2.

Researchers set out to determine the accuracy of wrist-worn devices at measuring both heart rate and energy expenditure, aka calories burned via physical activity. 60 volunteers participated, including 29 males and 31 females, each of whom wore several fitness trackers and completed activities like cycling, running, and walking.

If these numbers are important to you (and they are for a lot of people), it’s good to know the Apple Watch comes out ahead.