You can download the update directly on your device through the Apple App Store or by using the link which follows:
Facebook for iOS version 5.2 has the following new features and improvements:
- Now you can share the best stories from your news feed with just one tap.
- New Share link to re-post stories from your news feed
- Tag your friends in any post, comment or photo
- Smileys, hearts and other emoji in messages
- To sort your feed, tap the button next to News Feed in the left sidebar