Foursquare was launched in 100 worldwide metro areas.
The company changed the location model to allow check-ins from any location worldwide.
Foursquare announced version 2.0 of its check-in.
Foursquare reached 7 million users.
President Barack Obama joined Foursquare, hoping the white house staff would use the service to post tips from places the president has visited.
Foursquare launched a major redesign.
Foursquare launched Swarm, a companion app to Foursquare City Guide.
Foursquare launched Foursquare 8.0, a new version of the service which removed location-sharing and check-in features, turning to local search instead.