The Samsung Galaxy Watch 4 will now gradually become for Samsung's ecosystem what the Apple Watch is for iPhone users.
Looks like and feels like a real watch. Nice and fast user interface based on the round dial. Comes with eSIM as well as lots of training functions and new health functions such as ECG and measurement of body composition.
Blood pressure measurement requires calibration using the correct cuff blood pressure monitor. Unlike its predecessor, it does not support the iPhone, and you only get full functionality if you use a Samsung Galaxy mobile.