The Twitter Blue subscription service starts rolling out Thursday

Twitter has officially announced Twitter Blue, a paid subscription service that offers access to new features like undoing tweets and viewing threads in an easier to digest “Reader Mode.” Starting Thursday, it will roll out first in Canada and Australia, where the subscription will cost $3.49 CAD or $4.49 AUD per month, respectively. We already had a good idea of what features to expect from Twitter Blue thanks to sleuthing from app researcher Jane Manchun Wong, but now Twitter has detailed everything the service includes.

A new undo send feature gives you the option of retracting your tweets before they actually go live, and you can set a timer for undoing your tweets that can last up to 30 seconds. A Bookmark Folders feature lets you...

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