Twitter has released an update to its iOS app, bringing the version count to 5.5. With the new update, Twitter has added the ability to launch and install apps linked in a tweet. These feature is a direct result of Twitter's updated Cards feature.
Apps which support Twitter's Card functions will be able to be installed from the Twitter iOS app. Twitter has also included the usual performance increases, bug fixes, and improvements:
Twitter for iPhone now helps you discover, install and launch your favorite apps from Tweets. This update also includes the following improvements:
-Faster launch times and general performance upgrades
-"Retweeted by" in Tweet detail is now tappable
-Fix for reply-to-self in conversations
-Fix for bug that prevented undoing retweets in some cases
You can download the Twitter app from the Apple App Store.