Foursquare (service)

Four square, also known as downball, squareball, blockball, boxball, champ or king's square, is a ball game played among four players on a square court divided into quadrants. It is a popular game at elementary schools with little required equipment, almost no setup, and short rounds of play that can be ended at any time.

Foursquare is a local search and discovery service mobile app which provides search results for its users. By taking into account the places a user goes, the things they have told the app that they like, and the other users whose advice they trust, Foursquare provides recommendations of the places to go around a user's current location.