Apple Watch 4

This post is for you if you want to buy a watch on a low cost iPhone.
the Series 4 is the watch that took wearable tech from novelty items to medical devices when the FDA approved its use as an EKG and irregular heart rhythm monitor.
To check for irregular heart rhythms, the watch works in the background to check your heart rate every two hours. If an irregularity is detected, the watch sends you a notification.The Apple Watch 4 also innovated fall detection – a great feature for at-risk populations.

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Specs:

OS: Watch OS 5
Compatibility: iOS
Display: 1.78 inch OLED
Processor: Apple S4
Band Sizes: Depends on watch size
Onboard Storage: 16GB
Battery Duration: Between 24 hours and 48 hours
Charging Method: Wireless
IP Rating: 50m
Connectivity: Bluetooth, Wi-Fi, LTE, NFC