WS4 Access is an app users of the WS4 access control system can use to enter through doors, gates, barriers etc in buildings that are controlled by the WS4 web server access control system. Users of this app must first receive an invitation email from the WS4 system administrator. The email will include a temporary password which along with your email address can be used to log into the app. Once logged in you will have access though any of the entrances the administrator has authorised. The administrator may of also added a validly period if you are a temporary user.