For the Foursquare/Swarm apps, when they are able to track your location 24/7, they create a list of places that you may have visited and allow you to create an

For the Foursquare/Swarm apps, when they are able to track your location 24/7, they create a list of places that you may have visited and allow you to create an after-the-fact check--in. That's what's obviating the need for users to actively check in to the app(s).