Earlier today Twitter rolled out an update for both Android and iOS versions of their mobile app. The ability to swipe from your timeline for a quick  reply, retweet, favorite or share is being reintroduced for both platforms, as well as an enhancement to “Find friends.” In addition to these mutual changes, both versions have received their own unique tweaks. For more details, check out the changelogs after the break.

Twitter for iPhone

• Copy and paste: We’ve returned the ability to copy and paste the text of Tweets and user profiles. Just press and hold to copy.
• Link love: The “share” feature used to just give you the option to copy or email a link to a Tweet. Now, if there’s a link within a Tweet, you’ll see the option to tweet, copy or mail that link, or you can choose to read it later. (Select a “Read Later Service” under Settings > Advanced.)
• Pressing and holding links provides similar options, along with the ability to open the link in Safari.
• Direct messages: We updated the design for Direct Messages and returned the ability to mark all DMs as read. Simply tap the check mark in the lower right corner.
• Font size settings: Change the font size under Settings > Advanced.

Twitter for Android 

• Android 4.0 optimization

Source: Twitter