Redesigned Digital Crown
The redesigned Digital Crown is 30% smaller, yet features more components than previous versions of the Apple Watch. And for the first time, Series 4 comes with haptic feedback when scrolling with the Digital Crown. Read our in-depth post exploring the new Digital Crown to learn more.
Electrical heart sensors
You’ll notice a new sensor housing design on the rear of the Apple Watch casing, which now incorporates a new electrical heart sensor along with the standard optical heart sensor. In addition, the Digital Crown receives a built in electrical heart sensor. Both sensors work together to allow users to generate an ECG via the forthcoming ECG app for measuring heart health data.