In April, Twitter announced that it would replace developer access to User and Site streams with new API. Several third-party app developers warned that this would disrupt their ability to work with the service. Today is the day, then, that Twitter removes support for the older "outdated developer tools." The newer tools, called the Account Activity API, are now available for all app makers via the company's developer portal. Twitter argues that its apps and website are "the best Twitter experience," even as users take to the social network to complain that the company is #BreakingMyTwitter.