The iPhone application GPS Mapper from InstaMapper LLC is a free real-time GPS traking service. You can use it to track an iPhone online, share your location with friends and family and record tracks for later analysis. Sounds cool, but even after a few updates, this application never seems to connect to the GPS on my phone. It did work the first time but after that it never did. I would not waste your time with this one. It’s average rating on the Apple App Store is 2 out of 5 stars.