Series 4 -

The first over-the-counter wearable to offer a 30-second electrocardiogram.

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. Series 4

A 64-bit dual-core processor up to twice as fast as Series 3. The first over-the-counter wearable to offer a 30-second

The Series 4 introduced the design language Apple still uses today. Series 4

Do you need a for an existing Series 4?

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

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