Feedly, Flipboard, Inoreader, Reeder , scoop, NetNewsWire, QuiteRSS, Tiny Tiny RSS, Fluent Reader, NewsBlur, Feedbro, Feeder RSS feed reader, RSSOwl, RSSOwlnix, Newsbeuter, WebReader, Shrook, NewsRack, Public RSS Reader, MobileRSS, Feed Sidebar, Super Google Reader, GoodNews, NewsRob, Smart RSS [Fork], rsslounge, Feederator are some alternatives to RSS Guard.