[[xref:https://market.android.com/details?id=com.joelapenna.foursquared&feature=search_result|Foursquare for Android|Android Market :: 4Square]]
Foursquare is the most popular location-based social check-in service, for good reason. More and more mainstream businesses are jumping on the foursquare bandwagon each day, enticing loyal foursquare users to frequent their establishments by offering deals, discounts and even freebies. Foursquare also can help keep track of friends and contacts around you at a given time and notify you of the most popular bars, restaurants, clubs, etc. And you're rewarded for frequent check-ins, or check-ins at specific types of venues, with "badges" that serve as mementos of where you've been, as well as proof of your foursquare prowess.