This app solves this problem once and for all. Select the destination (double tap on map), select the alert area radius (using slider) and set the action. As soon as you enter the alert area, set action will be performed automatically and the person you are meeting will be notified about your whereabouts.
* automatically calls when you enter the set area near your destination
* automatically texts when you enter the set area near your destination
* alerts you when set action is performed
* save/load feature for frequently used alerts
I would like to hear from you about this app on:
facebook - http://www.facebook.com/ProximityAlert
google plus - https://plus.google.com/102550396790531987136