I will second the Glimpse recommendation for live tracking: it offers reasonably accurate location information as well as your speed and track. I find that it does not use that much battery on my iPhone se. It sends an email to my wife and then she sees a map showing location, course, and speed. You have nothing to loose by downloading the app and using it on your test drive. I am less enthused with the information from find my friends, but that may just me ........