Facebook introduced a new updated app for it's iOS platform not too long ago which used native code. This resulted in the app being a lot faster than its previous HTML5 version. It made everything about the app itself a lot more of a pleasure to use and mobile experiences are all about as being as quick as possible.
Facebook has just done the same to their Android app. There aren't any new features, just the app build from the ground up using native code. This has made the app a lot faster as expected and from reading the recent reviews for it, many are appreciating the new faster app.