I want to make voice/video calls between iPhones App using WiFi/Internet. How should I do that? I don't want to make calls on service provider number. It will make calls between apps on different iPhones like skype.
I didn't fount any way to search. I am getting confuse how to start working on it.
U need to use VOIP service, there are lots of VOIP API but maximum are paid. check apple doc: http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/AdvancedAppTricks/AdvancedAppTricks.html
Check This also Twillo