GuestOf puts the control of who comes into your apartment building, and when, back in your hands. You simply create virtual keys for your friends or family with the GuestOf app, and then share those unique keys directly to your guests phone. When they arrive at your building, all they have to do is scan the key at the GuestOf device installed at the front door - no searching and waiting at the directory or intercom. Youll be notified on your phone that your guest has arrived, and management will know who they are and who theyre here to see - no need to sign in.