It used to be every 4 weeks, now it says every 2 weeks. There is no explanation of changes other than the updater saying this: "Thanks for using Facebook! To make our app better for you, we bring updates to the App Store every 2 weeks. If you have iOS7 or up, you can update the app automatically (without checking back here) by going to Settings > iTunes & App Store > Automatic Downloads and turning on Updates. Every update of our Facebook app includes improvements for speed and reliability. As other new features become available, well highlight those for you in the app." I'm so glad I disabled Automatic App Updates and stayed with Facebook app version 6.7.2, before they circumcised Messages out of the main app and enabled all these crappy auto-play videos. They will have to pry version 6.7.2 out of my cold, dead hands before I ever upgrade.