iOS 11 gives us Emergency SOS for the iPhone (via iMore)

from iMore

from iMore

Apple Watch and the iPhone iOS 11 both have an Emergency SOS feature you can set up to have a shortcut to call emergency services (such as 911 in the US).  When enabled, emergency services can be called on the iPhone by pressing the sleep/wake button 5 times quickly. iMore shows us how to set it up here.

For reference and further reading:

iPhone Health app features (via IBT)

The Heath app on the iPhone has 5 features highlighted in the International Business Times article, here. Set-up takes a small amount of time, and the usefulness benefits far outweighs any inconvenience. IF nothing else, complete the Medical ID information.  It makes your emergency medical information (and contacts) accessible without having to unlock the phone.

For reference and further reading: