https://techcrunch.com/2021/06/03/twitter-launches-its-premium-subscription-twitter-blue-initially-in-canada-and-australia/

Twitter today is officially launching its first-ever subscription service, Twitter Blue, initially in Australia and Canada. The subscription will allow Twitter users to access premium features, including tools to organize your bookmarks, read threads in a clutter-free format and take advantage of an “Undo Tweet” feature — which is the closest thing Twitter will have to the long-requested “Edit” button.

The company’s plans for the subscription service had been previously scooped by app researcher Jane Manchun Wong, who uncovered the service’s name, pricing and feature set by digging around inside the mobile app’s code. Twitter Blue also recently showed up as an in-app purchase, further confirming some of Wong’s findings.