The application is downloaded on to either an android or iPhone.
It enables users to message friends for help in an emergency.
A message is sent to nominated person and it contains a link to your current location. This is done using the GPS tracking built into the phone. The emergency mode can also record audio.
The couple have eight children between them and while they hope the kids will never have to use the app at least they have something that could save them in an emergency situation.
They hope to donate a percentage of the sales profit to victims of crime.
If you want more information check out: http://helpmeemergency.wordpress.com/ and they are also on face book.