Swarm have just updated their app to support the watch and it is really nice. Unlike many watch apps that are clunky and complicated, this app keeps things simple with a single check in button and a force press to change location. I really like it. It also shows friends nearby but I never use that functionality. I'm sure many will comment about how pointless Swarm is etc and that's fine but not my point - just highlighting a nicely designed app that acknowledges the fact that watch interactions are meant to be brief and easy. (P.S. If anyone wonders why I use Swarm, I like having a log of everywhere I've been, that I can view on a global map, and also populates a history in Foursquare so I can leave tips/reviews/ratings to further improve foursquare recommendations).