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

50% louder than previous models for clearer calls and Siri.

While it no longer receives the latest watchOS updates, the Series 4 is credited with saving the product line. By prioritizing and screen real estate , Apple moved away from being a "mini-phone" on the wrist and toward being a life-saving tool.

Do you need a for an existing Series 4?

Over 30% more screen area with rounded corners.

Every model featured a black ceramic and sapphire crystal back for better cellular reception. 📉 The Legacy

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

A slimmer profile that sits closer to the wrist.