iOS 10 brings functionality similar to this. [0] [0]: https://developer.apple.com/library/prerelease/content/releasenotes/General/WhatsNewIniOS/Articles/iOS10.

iOS 10 brings functionality similar to this. [0] [0]: https://developer.apple.com/library/prerelease/content/releasenotes/General/WhatsNewIniOS/Articles/iOS10.html https://developer.apple.com/library/prerelease/content/relea... > CallKit. CallKit also introduces app extensions that enable call blocking and caller identification. You can create an app extension that can associate a phone number with a name or tell the system when a number should be blocked.