Basically a "check-in" service for those who want to know where their friends are. By using their application, users can "check-in" to inform their friends where they are and every "check-in" will be awarded with some sort of points. So the more places you "check-in", the more points you get. And you will become "mayor" if you check in more times than anymore else. Yes, I have no idea why are there people so interested in knowing where their friends have been, nor I see to need to tell everyone where I have been or where I frequent. I mean I frequent the men's toilet very often, do I need to "check-in"? And if I check in too often, will I be crowned the "mayor" of the men's toilet? And if I do, what do I get? A pat on the back from my colleagues and then a pink slip from my boss? Anyway, this is some sort of social-networking fad and it requires your mobile device to be internet enabled in order to get the location.