I don't, but that sounds useful. I recently had a fall in the woods & hit my head on hard ice, but was totally OK, just embarrassed, even tho no one saw it happen. But if I were unconscious & no one came by to find me, it could have been a different situation.

I let Wifey & Daughter know where I'm going & when to expect me back. Daughter & I share location using the "Find My Friends" iPhone app. But that requires someone checking your location regularly & then doing something if they see your signal stop moving. We recently discovered this is not a great plan when Daughter was driving w/ Boyfriend in Colorado & I saw her signal go off the highway & stop on a random isolated dirt road. I panicked & went to our local police station for advice. They interrogated me had me call Wifey & the Boyfriend's parents & tracked his phone to a nearby hot spring. Wifey didn't tell me the kids were going to do this, so I panicked needlessly. I'm sure I'm not the 1st Dad to call the police to help find out where his Daughter was, but this was most embarrassing.