Facebook today updated the way photos look like on mobile devices (at least on iOS and Android).
Starting today, we’re rolling out an improved design for posts in news feed on your mobile phone. Now photos are up to 3x larger, and all posts will fill your mobile screen from edge to edge. The new design will be available on iOS, Android and m.facebook.com.
It looks a lot better, is it a coincidence that Google + just did the same on their app last week? You don’t need to update your app, the changes happen server side.