However, there are a couple of new features that have garnered some attention since the original announcement, such as the US-only, FDA-cleared ECG functionality and fall detection.
But, if your Apple Watch detects that you're moving, it waits for you to respond to the alert and won't automatically call emergency services. The default setting does make sense, as older people are more prone to serious falls where they will need emergency assistance. You'll get a tap on your wrist and an audible alarm, plus an on screen alert saying "It looks like you've taken a hard fall".
Here's how to enable it to ensure your emergency contact knows when you're in trouble. Given how much Apple advertised that safety feature, some might have expected it to be enabled by default for all.
That said, there may appear to be a case in leaving fall detection disabled, particularly for the more physically active among us, as the online manual warns that it will be "more likely you are to trigger fall detection due to high impact activity that can appear to be a fall".
As found in an Apple Support page by one of the Reddit users, it has been clearly mentioned that the fall detector needs to be manually enabled. If you want to know more about the feature, including how to turn it on, read on. However, if no movement is detected for a minute, the Watch will start a 15 second countdown, further tapping and sounding a louder alarm.
While talking about the Watch Series 4, Apple also explained about one of the key features - Fall detector. This is despite the latest Apple Watch featuring a chassis that's 6 percent slimmer.
The battery capacity has been increased about 4% to 1.113 Wh (291.8 mAh at 3.81 V), up from 1.07 Whr (279 mAh at 3.82 V) in the Apple Watch 3.