FeedsAPI gives you the best RSS full content from all around the Internet and you can use it everywhere, from your RSS reader, Smartphone, Google Reader, tablet, iPhone, iPad, Android, windows phone and kindle to your web application.
An RSS feed is a Really Simple Syndication or Rich Site Summary, which basically allows readers to receive real-time (within 30 minutes) updates when their favourite blogs or websites add new content. Think of it as a kind of virtual system of beacons that sites use to signal RSS Newsreader apps when content is added.
RSS feeds are used by virtually all news organizations and all blogs, by info-rich, rapidly changing sites such as eBay and craigslist, travel and real-estate services, and by many online project management tools. RSS is also being applied in a variety of other ways that are rapidly changing familiar and indispensable Internet tools such as search and email.