Lock for FB description

This app lets you protect your Messenger privacy through a PIN.
After installation it will ask you to set a 4 digit PIN, and will show the configuration options to lock Facebook Messenger.

Features:-
★ It's free and has no limitations.
★ Best Messenger block on market
★ Keep your messages safe
★ Protect uninstallation and settings for more security.
★ Capture intruders when wrong PIN entered. Have Fun :)
★ Customize autolock time
★ It is ultra lightweight. Uses low resources and space.
★ Minimum special permissions required.
★ Design attractive and simple user interface.