Foursquare has released an update to the Swarm app for iOS. It now shows mayor leaderboards among your friends for every check-in.
The Swarm app now has easier sharing to Twitter and Facebook. It also has faster and more accurate check-ins. There are photos from venues as well.
Swarm launched this May as part of an effort to separate the check-in functionality from the Foursquare app. The Foursquare app now has an emphasis on location discovery. Swarm is not as popular as the original Foursquare app though. The app has a 2 star rating on the Apple App Store.