How to lock Messenger with passcode on iPhone
is there any chance to lock third party apps(Watsapp,FAcebook,Messenger) with pass code on iPhone
iPhone 7 Plus, iOS 10.1.1
You can only lock an app with a passcode if the developer of the app includes that feature. I don't know if any of those apps do. You could also sign out of them when you're not using them. Or, put a passcode on your phone.