Last Updated on April 5, 2024 by pg@petergamma.org Smartwatch accuracy tester Rob ter Horst has tested more than 100 smartwatches with his Polar H10 chest strap: His scientific justification to choose a Polar H10 as a reference device for his tests is this paper: RR interval signal quality of a heart rate monitor and an … Continue reading You want to test smartwatches against a medical or research grade reference device – use a Schiller CS 200 Ergospirometry Diagnostic Equipment as your reference device