Since you're going to have your cell phone with you, download the free RoadID app. It will do what you want and won't cost a dime. I use my iPhone 5c as my bike computer and I have ridden in both the Orlando and Clermont area and cell coverage is excellent. Never had a problem with GPS signals either. I was using the RoadID app on all my charity rides to let my wife know where I was at any time during the ride. I now use Cyclemeter which I can set to notify her by time or distance. Works just as good as Garmin Live Track.