Uses an improved accelerometer and gyroscope to detect hard falls.
Internals were overhauled to match the ambitious new software. Series 4
A 64-bit dual-core processor up to twice as fast as Series 3. Uses an improved accelerometer and gyroscope to detect
The Digital Crown added mechanical-feeling clicks for precise scrolling. high heart rate
Alerts for low heart rate, high heart rate, and irregular rhythms (AFib). 🚀 Re-engineered Performance
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.
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