Twitter for Android has been updated to version 3.0 and the Twitter for iPhone gets updated to version 4.0 that brings new design and new tabs such as Home tab to view all the tweets, Connect tab to view your interactions and mentions, Discover tab to search for tweets, view stories and trends and Me tab to view your tweets, followers, following, lists, DMs and saved searches.
Twitter for Android gets the most awaited Twitter photo sharing option (pic.twitter.com), Trends (inside Discover tab) that are already available for iPhone .
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Download Twitter for Android and iPhone from the Android Market and the Apple iTunes store for free. New redesigned version of Twitter for iPad would be available soon and would also be rolled out gradually for the web users. Also check-out Hands-on with the new Twitter for iPhone to know more.