What is facebook app manager?

Facebook App Manager is a tool developed by Facebook that allows users to manage their Facebook applications on their mobile devices. The app manager allows users to log in with their Facebook credentials and view all the apps that are associated with their account. Users can also manage app notifications, turn off app access to their account, and uninstall applications from their device. The app manager also allows users to view data usage for each application and turn on or off cellular data access for specific apps. Facebook App Manager is available for free on the Google Play Store and is compatible with Android devices.