You can find your Apple Watch serial number using your Apple Watch or its paired iPhone. Here's how to do it.

To pair an Apple Watch with your iPhone, you'll need to have the latest version of iOS installed on your iPhone.

As per Apple, the new hypertension detection feature on the Apple Watch "works passively in the background" and assesses readings over a rolling 30-day period. If something does seem amiss, you'll see ...

A new Apple Watch feature passively analyzes optical heart sensor data during waking hours to flag 'possible hypertension' ...