Global Positioning System
The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites.
what apps are there that use GPS?
This is the perfect app for any husband. Not only does it track where you are going, it also tells you when you are near something that you have to do…like buy milk or take back library books. GPS-R is sweet because it will remind you of certain tasks when you are near them geographically.
Foursquare is a free app that helps you and your friends make the most of where you are. When you're out and about, use foursquare to share and save the places you visit. And, when you're looking for inspiration for what to do next, it will give you personalized recommendations and deals based on where you, your friends, and people with your tastes have been.