I wore 3 blood pressure watches for a month to find the most accurate - and this one wins

This ZDNET article tests and compares blood-pressure-capable smartwatches (YHE BP Doctor Fit, Samsung Galaxy Watch Ultra, and Amazfit Cheetah 2 Ultra/Balance 3) against a Garmin Index BP Monitor reference, describing measurement procedures, calibration requirements, and regional/ regulatory availability; the Amazfit devices were most accurate (within 2–4 mmHg), Samsung showed larger deviations, and the YHE device often overestimated systolic values and produced inconsistent readings, leading the author to recommend Amazfit while noting hopes for broader FDA clearance and future real-time blood pressure support from Apple.