If you get stuck in emergency situation, then this application can be a savior. It would fetch your current address and send to 1 to 3 phone numbers mentioned by you. If you shake phone 5 times then app will activate, Also it will start buzzing sound so that nearby people can notice you and come for help.
Good to keep app for girls and senior citizens and people who generally travel to unknown riskier places.
App fetches address from mobile data connection or GPS or wifi connection which ever is available.
In case address is not available, app sends location in a url format having lattitude and longitude. Recipient would click on that URL and will get location on google maps. Even if no gps or location is available, app will send an emergency help request so that emergency contact can call back.