First is the number of drafts it holds. Right now, Wren will store three draft tweets. I understand that Wren isn’t Birdhouse for the Mac, but if you’re going to let me store drafts, let me store as many as I like.
This is a huge lack of feature for a $5 app. And I much as I like Caolo, he still gave it 8 out of 10. I would ask if there is an ability to search, but with only room for three drafts, I am guessing there isn’t. It looks great, but until it can hold more than 3 tweets, I am not interested.