I need a GPS reporting app for someone who frequently drives alone for great distances away from home. We're worried that something bad could happen (like run off the road and not be noticed). What would be ideal is an app that would report her position about once or twice per hour to an e-mail address. We don't need real-time reporting as that would eat up the battery too much. There are so many of these tracking apps out there that I hope someone can suggest a few that that they know to be reliable (that they have actually tried) so we won't have to install a dozen or thirty just to try them out.