Twitter has released a major update to its official iOS app adding a significantly redesigned user interface for the iPhone and iPod touch. Designed to bring the mobile user experience in-line with the Twitter.com web site, Twitter 4.0 provides a new set of views for the user’s Home timeline, a Connect screen that combines mentions and related activity such as retweets and favourites and a new dedicated Discover view designed to allow users to explore trending topics, find new people to follow, browse interests and explore hashtags. A new “Me” section provides quick access to the user’s profile along with drafts, lists and direct messages. The new UI design is presently only available on the iPhone with Twitter on the iPad retaining the same UI design and features as in the prior version. Twitter 4.0 is available from the App Store as a free download.