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 guest's 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. You'll be notified on your phone that your guest has arrived, and management will know who they are and who they're here to see - no need to sign in.
The app can also be used as an entry pass for offices/co-working spaces at participating locations.