The Twitter application for iOS has been updated to version 6.0. The update adds a new design and navigation bar with new icons for easier access to DMs. The Discover feed, can now be accessed along with the Activity feed by swiping in Timelines. The update also allows you to send and receive photos via Direct Message and brings some improvements in the notification options en search results.

New design. 
– Refreshed look and feel. Home, Activity and Discover now available by swiping in Timelines. Easier access to DMs. 

Share photos in Direct Messages. 
– Send and receive photos via DMs. 

Notifications from your network. 
– Choose to view replies, retweets, and favorites from only the people that you follow. 

Search got even easier. 
– Access tweets from people you follow and near you, directly from search results. 

Safari Reading List support 
– Save web articles to read later with Safari Reading List.

Twitter for iOS can be downloaded for free in the App Store for the iPhone and iPad.