What is Heart-rate sensor accuracy?
Optical sensor quality and sampling rate.
Short answer
Continuous monitoring drains battery; check the rated life with it on.
Heart-rate sensor accuracy when buying a smartwatch & fitness band
Optical sensor quality and sampling rate.
Why it matters: Cheap sensors lag badly during interval workouts, making training data useless.
Look for: Continuous monitoring drains battery; check the rated life with it on.
Full Smartwatch & Fitness Band buying guide