The Sinch SDK for iOS lets developers add voice calling and instant messaging capabilities to their iOS based mobile apps. The SDK handles signaling and audio management. In addition it offers support for:
App to app calling
App to phone calling
Instant messaging to single and multiple recipient
Everybody knows about SMS these days, and as it has become a regular part of daily life here in the United States, so too have simple, easy-to-use SMS APIs become available for developers to use. But few people know that MMS - Multimedia Message Service - is just as common and pervasive a part of the U.S. mobile ecosystem, and that MMS APIs are also available.