
Your Smartwatch’s New Blood‑Pressure Feature Isn’t the Breakthrough—It’s the Calibration Trap That Can Flip Your Numbers (and Your Anxiety) in 28 Days
Some watches don’t truly “measure” blood pressure—they estimate it, anchored to cuff readings you must refresh every 28 days. That monthly reset can change your baseline, your trust, and how you interpret your health even when nothing is wrong.


















