I highly recommend inoreader.com. It is like the old google reader on steroids. It is the first app I open in the morning to get my news and my personal feed consists of some 4000 single feeds from everything that I gathered on the internet. All nicely organized with filters and folders. It is a bessing for keeping up with youtube content, because all channels appear as single feeds that you can organize. You can put several single RSS feeds into a folder which presents itself again as a feed.