PanicTrigger is an Android app which can help you in case of an emergency situation. In case of an emergency you tap on a big red button which causes the app to send out SMS to your preconfigured contacts without comfirmation. So don’t tap on the wrong button ;-)
PanicTrigger runs in the background and listens for incoming SMS this is why it needs the permission to read your SMS. Trust me I won’t read your SMS :)
If an ingoing SMS contains a specific word AND is from a specific number then an alarm will go off and call the sender of the SMS in one minute. Enough time for you to wake up and realize that the alarm has been triggered.
Your contact(s) can trigger your alarm with a simple SMS and vice versa. If your opponent doesn’t have this app he will only see an SMS with the text “Panic” (by default) and your current GPS coordinates. This makes this app useful regardless of your contact has this app installed or not.