Peek and Pop gestures are available for previewing tweets, pictures, links, and user profiles, and with a swipe up on a Peek gesture, there are quick tools for sharing, reporting, muting, and blocking.
Twitter previously featured 3D Touch support, but it was limited to Home screen Quick Actions, allowing users to do things like search, create a new tweet, or send a direct message.
Twitter can be downloaded from the App Store for free. [Direct Link]
Article Link: Twitter for iOS Gains Support for Peek and Pop 3D Touch Gestures