iOS Make Call/Facetime within App
===

I have an app where people need to connect to each other via phone and facetime. The thing is, when the call is made, I need the phone number of both parties to be hidden on both phones. 

Also for the facetime connect - I need to connect two iPhones even though both parties will not have each others email addresses or phone numbers. My app will serve as a hub to connect people.

How do I go about doing this?