Become a Better MarketerGet Ongoing Marketing Training & SupportBEGIN YOUR JOURNEY NOW Since location-based check-in app Foursquare was launched at South by Southwest in 2009, the app has seen exponential growth, reaching over 7.5 million users this year. Other apps have been popping up as well, as geolocation takes center stage in the mobile arena and users flock to apps that create games from ty