You can mail with few taps.
If you have already set it up, with two taps you can send this emergency mail.
Simple to use.
1. set up some parameters like recipients, template messages, GPS and sender address.
Thats it.
Note:
If you got a crash while choosing a person from Contacts under iOS 6.0.1, follow the instruction below:
Settings.app > Facebook > Turn Contacts in Allow These Apps to Use Your Account: OFF.