Hypertension notifications are a new feature in watchOS that comes to several older Apple Watch models, here’s how to set it up.

From radio labs to anechoic chambers that look like Elsa's castle, here's a rare look at how Apple tests Bluetooth, Wi-Fi, 5G and satellite connectivity on the Apple Watch.

Apple's secretive labs use sci-fi-like chambers to make sure your Apple Watch can stay connected anywhere on Earth — and even ...