HelpKnock

When an earthquake or a collapsed building takes the network down, HelpKnock turns phones into Bluetooth beacons. People who need help can be found, show how they are, and talk with rescuers nearby, without any signal. Not a replacement for emergency services. If you have any signal, call your local emergency number first. Both phones need HelpKnock: the person asking for help and the rescuers nearby. FOR PEOPLE WHO NEED HELP • Tap "I need help" and your phone starts broadcasting at once. There is nothing else to press, and it keeps broadcasting with the screen locked. • While HelpKnock is open, your status, position and messages also reach rescuers on the same Wi-Fi, no internet needed. With the screen locked, Wi-Fi stops but Bluetooth keeps broadcasting. • Battery, how long since you last touched the phone, how long the phone has been still, and your last known position are shared…