There are a handful of publishers and consumers of the checkin property in h-entry now. The value of the checkin property is an h-card describing the venue or location being checked in to.

Publishers

• OwnYourSwarm converts Swarm checkins to an h-entry Micropub request, including the checkin property
• p3k used by myself publishes checkins in the checkin property (example)
• Martijn publishes the checkin property (example)
• Seb publishes the checkin property (example)
• David Shanske publishes the checkin property via WordPress (example)
• swentel publishes the checkin property via Drupal (example)

Consumers

• Together consumes the checkin property to display checkins on a map view
• Monocle consumes the checkin property to show a small map image on checkin posts
• Indigenous for Android consumes the checkin property to show a small map and links to a routing app to get directions