Huffington Post has launched a Facebook app for news. In a reversal of typical app development, it’s mobile-only for now with a desktop version TK.

It’s an app like no other on Facebook, instantly personalized as soon as you connect. It shows news articles your friends are reading, commenting on and liking, as well as stories not yet popular with your friends but that match your own interests. We’ve also enlisted Patch, with over 800 hyperlocal sites across America, to find local stories you’ll care about, as well as stories and video from across the entire AOL Huffington Post Media Group.

In August 2009 HuffPost launched HuffPost Social News, which taps into a reader’s Facebook account to personalize the content but lives on the HuffPost website.

The Wall Street Journal launched a similar Facebook app in September. As the Lab’s Megan Garber wrote of that app, “It’s a way of disentangling the Journal’s brand from its website — and of building a distribution strategy around the most famous anonymous quote in the future-of-news world: ‘If the news is that important, it will find me.'”