iOS安装了相同应用程序的联系人列表

I'm looking for a way to create a list of contacts on iOS for people who have the same app installed. Maybe a way to sync Facebook contacts and send e-mail invitations to those contacts to install the app. The point is that I need some way to know which contacts on my phone have the app installed and I can't seem to find information on the different approaches to this.I'm looking for a way to create a list of conta