The Apple Watch Series 4 arrives with a bigger screen and an on-board ECG
https://newatlas.com/apple-watch-series-4/56308/
New iPhones weren't all Apple had to show off in California today, because it also took the wraps off the Apple Watch Series 4. The new smartwatch brings with it an edge-to-edge display, a faster processor, and advanced heart rate monitoring that can even give users an ECG reading.