Foursquare was one of the location apps (now owned by Swarm). Users could ‘check in’ to a place they visted and share their geolocation data via mobile phones.
Swarm that allows users to share their locations within their social network. The app offers a feature called ‘Neighborhood Sharing’ which can constantly share a user’s general location in the background. Rather than pinpointing a user’s position on a map, ‘Neighborhood Sharing’ keeps a user’s location intentionally “fuzzy”, sharing only their distance away, and approximate neighbourhood or area, with their friend. This can be switched off in settings.
Facebook Places is a feature that lets users “check in” to Facebook using a mobile device to let a user’s friends know where they are.
Social Media for Learning 