Smartwatch Health Sensors Explained: Accuracy Limits, Validation, and What the Numbers Actually Mean
Smartwatch health sensors are good at trends, but the “exact number” can be wrong I’ve owned a few smartwatches over the years, and the biggest surprise is how often the headline numbers look “medical-grade” even when the sensor is doing guesswork. That doesn’t mean the watch is useless. It means you have to read the […]
