I like that it is built using angular so I can get some tips on how authentication is done. However I think the UI needs work, for example expanding a feed button is all the way to the other side, why not slide down on click of title? I found some UI bugs for example, where the + and power icon was underlapping under my feed. The power button also does nothing for me. I also had issues with adding non rss feeds. Otherwise I like it. Nice work.