Active in USA.
 
An app that uses advanced technology to get help in uncomfortable and/or emergency situations at the push of a button. The following instructions to do so are :  1) Press and hold the button whenever you feel discomfort. 2) Release the button when you reach your home, car, or safe destination, and enter the 4-digit password. 3) In danger? Simply release the button and do not enter your password. 4) Local police will be notified of your location.