You can bookmark from within any Twitter app or twitter.com by sending the tweet in a Direct Message to @markfolder.
How to:
Here’s how to do it on twitter.com:
On the tweet, click on the share icon, then click on “Send via Direct Message”.
In the “Search people” box, search for “Markfolder”, select the Markfolder account, and then click “Send”.
Markfolder will reply saying that the tweet has been bookmarked and saved in the “Inbox” folder. Click in the Messages section of twitter.com to check this.
