This looks really interesting. I'm always in favor of more RSS-readers competing, and Markdown-like also gets bonus points.
One thing I'd love to see, as someone who surveyed the field back when Google Reader shutdown and found my new RSS home (Newsblur), is a comparison table/list.
In other words, how does Readdu compare to Newsblur, Feedly, TTRSS, etc. (Bonus points for being transparent on where you don't have an advantage as well as where your advantages are)