Another critical task (IMO) is to be able to get your GPS coordinates in order to send/tell them in an emergency.
While the Apple app Compass will display your coordinates, I can't figure out how to copy them from them.
I've downloaded the app "GPS Location" for that purpose. I dedicate my last page of apps to the "emergency apps" - including First Aid, PocketCPR, Compass, and iWrecked.