Series: 4

40mm and 44mm sizes replaced the original 38/42mm.

A slimmer profile that sits closer to the wrist. Series 4

Are you writing a on Apple's design evolution? 40mm and 44mm sizes replaced the original 38/42mm

Alerts for low heart rate, high heart rate, and irregular rhythms (AFib). 🚀 Re-engineered Performance high heart rate

This model turned the Apple Watch into a certified medical tool.

The Digital Crown added mechanical-feeling clicks for precise scrolling.

Do you need a for an existing Series 4?