Bolt App Lock claims to lock down any app on a phone using a pin code. The idea is that if your phone is somehow stolen while the screen is unlocked, the thief wont be able to open your banking app or email app that contains sensitive information. Facebook has launched an app that siphons vast amounts of data from consumers cell phones and shoots it back to Facebook to do with whatever the hell it wants. This violates a pretty basic rule: Any app that purports to offer security must avoid unnecessarily collecting data about your every swipe and click.”]
Source: https://gizmodo.com/facebook-launches-another-deceptive-security-app-design-1823650981