Facebook has launched an updated version of its iPhone app (version 3.5) which brings in a whole host of changes, tying the mobile app in-line with the recently announced Google+ style options and security features.

But one thing that is a bit disappointing is that the iPad version of the app, which was hidden within the code of the last update, seems to have disappeared.

What is on board though, is a number of new security options and more control over who sees what.

The update notes state that it is now "easier to share with who you want...the ability to tag friends and places in posts...the ability to share external links from a web view....new design for Profile and Group Walls.... improved the sharing tool to add privacy controls on posts and match your settings on the web site".

There's also a number of bug fixes too, including a fix to the annoying Chat count issue.

Facebook 3.5 for iPhone is available in the App Store now. It is, of course, free.