TweetAmplius allows you to remove the character limit for messages written on Twitter

  TweetMore is a tweak released during this day in Cydia, and with its help you should be able to write on Twitter messages that have more than 140 characters. Normally this is possible using services like Tweetlonger, but the developers of this tweak claim that the limit can be removed even in third-party applications available in the App Store, but they do not explain the method by which everything is done. TweetAmplus is available for free in Cydia's BigBoss repo and theoretically works on any iDevices.

"TweetAmplius" (Longer tweets) is a Cydia tweak that allows you to send tweets that have more than 140 chars. Also the tweak allows you to send dm's that contain more than 140 chars. The tweak works with The Twitter Official APP on ver 5.x and TweetBot version 2.6.2. NO SCREENSHOTS – Works on all jailbroken devices that have Twitter/TweetBot. –Work on All versions– We are Ariel Aouizerate and Daniel Ferreira. Twitter links below.