1: Facebook is Spyware. They FORCE the app on people by disabling the message functions in mobile browsers. 2: The app is way to big for what it does. 3: You can't turn it off, it's always running in the background. 4: it saved my login info based on my phone's serial number. I factory reset my phone and it REMEMBERED MY LOGIN INFO. if you sell your phone, make sure to change your Facebook password! 5: after all that, it's constantly not working.