Updated 10/21/20: There have been a few tweaks to the Health app interface. This article has been updated to reflect them.
There are plenty of iPhone features that feel like you just can’t live without them. But there is one that can literally save your life: Medical ID.
If you get into an accident or otherwise become unconscious or unresponsive, a first responder can pick up your phone and place an emergency call. But they can also tap the Medical ID button to be taken to a screen that shows important information about you: Age, blood type, allergies, medical conditions…whatever information you wish to share that may help a medical professional to treat you properly.