They’re called location sharing apps and the premise is simple: you and all your friends and family share where each other are at any time, cutting out the need to keep checking email or sending text messages back-and-forth. They are a kind of app that continues to get better as tech evolves. Here’s three of the best: Glympse lets users share their location in real-time with other Glympse users through GPS. Set it up with friends, family, co-workers, or anyone and they’ll know exactly where you are and when you’ll be meeting with them. Users can set Glympse to work for a specific time period, too, so you don’t have to worry…