The blue bird's been awfully busy since its IPO hit the books, and now it's reportedly considering a standalone messaging app. According to AllThingsD, sources close to Twitter say the company could be considering taking its direct messaging service a step further and spinning it off as its own app. The article goes on to say that Twitter has been keeping a close eye on now-you-see-it-now-you-don't messaging app Snapchat, running a survey to assess its impact, and has even met privately with employees from MessageMe. MessageMe notably reached 5 million users within 75 days of its launch. The news of a possible Twitter-backed messaging app comes just days after changes to its direct messaging service that allow users to reach out to others without having to follow them first.