Twitter might be working on its subscription-based service named Twitter Blue

Micro-blogging site Twitter had previously confirmed that it is exploring a paid subscription model for some features, and recently speculations have come to light about how much this new subscription-based service will cost and what it will be called. According to The Verge, Jane Manchun Wong an app researcher tweeted on Saturday that the paid version, which is Twitter Blue, will cost USD 2.99 per month, and will include an Undo Tweets feature and bookmark collections.