Popwalk is an app for viewing artwork, performance, and music, in specific geographic locations. This application uses the GPS information on smartphones for exhibiting "site-specific digital art." This includes performance, dance, video, animation, music, or other time-based media. Artists upload the art information to Popwalkapp.com, along with geo-location information for the art. Users open a map on the app that shows the locations of the artworks. When the viewer arrives at the location of the artwork, the phone unlocks the artwork, allowing it to be viewed, but only in its specific location.