Apple Watch Series 4
The Apple Watch 4 has an electric heart rate sensor, so you'll receive notifications when your heart rate is lower or higher than usual. The Apple Watch 4 also has fall detection. That means the smartwatch alerts set contacts when it registers a fall. The display is virtually bezel-less, so you can see more information on the dial. The Apple Watch 4 is waterproof, so you can also wear it in the shower. You can choose the Apple Watch 40 or 44 millimeters.