Android app lets you use the lock screen to get your lost device back
show emergency medical information, any pertinent medical conditions and info like allergies and blood type. Allowing paramedics or other first responders to have access to this information can often be the difference between enjoying a cold one hours later, with a slab of ribs in front of you, and being a cold slab hours later with a "Y" cut separating your ribs.
With settings that delay misHaps from opening anytime between 1 to 60 seconds, users still get a chance to unlock the phone without triggering the app. It seems that the developer thought of just about everything just in case you do have a, ahem, mishap.
source: GooglePlayStore via androinica