Record the conversation of phone - ios [duplicate]

Answer 1

There is no public API for this. No app headed for the App Store can record phone calls made with the standard Phone app.

Answer 2

There is no public API for recording the calls made (or received) by the built-in Phone app.

You will have to implement your own phone calling mechanism. You'll probably want to use VoIP. (That is what Google Voice uses, for example.) You'll need to run your own server on the Internet, or contract with an existing VoIP service. You'll want to use in-app purchase to let the user buy minutes, because it costs money to run your own server or use a third-party service.