Alive -- a dead man's switch
Sometimes, that date you're going on feels a a bit unsafe. Or you're finally climbing a 14er. Or you simply live in Detroit. For all those cases, a dead man's switch is a useful tool! Whenever you don't promptly answer an _ Are you ok? _ query, a text will be sent to your emergency contact, saying that you might be in danger!
Built on top of Microsoft's Azure platform, Alive offers an unprecedented ease of use and availability, with simple access through Facebook's Messenger! For all iLovers, there's an iPhone app as well, providing the additional feature of updating the user's location or triggering a switch when no heartbeat is detected or beats at an unhealthy rate.