Hit Me Up is an app that connects you to friends in cities you visit. Let's say you are going on a trip to Boston, but you can't remember which of your friends live there. You could do a facebook search, cross reference the names that come up for Boston with names you have on your phone, and text each person individually, but this is the 21st century. Hit Me Up does it all for you, sweetly and succinctly. Never have a lonely trip again!