Twitter has become an essential social network to keep up-to-date about everything. That makes this official Twitter client for iPhone a must have for any user in this social network, because knowing everything about your friends no matter where you are can be essential for you. Not only will you be able to receive messages, but you will also be able to tell everyone where you are, take photos and upload them, share comments, etc. In short, if you are in Twitter, you need this Twitter client to be always on. Twitter is now testing 280-character tweets on some accounts The end of the world as we know is just around the corner. For some people it's a betrayal of their roots, for others a liberation when posting the intricacies of their online monologues, but the news is out that Twitter is testing the use of unrestricted 280-character tweets . Although it still hasn't been confirmed that this is an immediate change, several influential accounts are already using it and giving us an idea of the repercussions the change could have.