This is a crowded space as you mentioned. I don't know why this is any different then Flipboard from reading the description, only thing maybe is that you remove advertisements and make it easier to read. However, the big difference between you and Flipboard is that Flipboard has a brand that I know of, its free, and I know there is a large team behind it making it better all the time (or at least trying to).

Edit: One thing I forgot to say, is that the app actually looks pretty nice. Sadly, I don't think that is enough to break into the market.