Just set a short message and a list of phone contacts, then tap Gelp 3 times (ready-set-go) and an SMS is sent to the contacts in the list, with your message and position.
Simple, no fuss, no looking through contacts, no trying to type, just press 3 times and its done. The SMS includes a maps URL that can be loaded by Apple and Google maps.
-Simple full screen UI to send message
-Tap screen 3 times and the message is sent
-Pre-set a message (location is always added)
-Pre-set contact list
-Indication if GPS is not active
-Indicates if location is stale (a stored location is out of date)
For detailed help see http://gelp-help.blogspot.co.uk/