Sinch In-App Calling

Overview

Real-time voice and video SDK for Android, iOS, and JavaScript (Web). Connects to Sinch's cloud for signaling and routing.

Supported call types

• App-to-App (VoIP/WebRTC between users)
• App-to-Phone (call PSTN numbers)
• App-to-SIP (connect to PBXs, contact centers)
• App-to-Conference (multi-party calls)
• Phone-to-App / SIP-to-App (inbound calls)

Agent Instructions

Prerequisites

The user needs a Sinch account with an application key and secret from the Sinch Build Dashboard. See sinch-authentication for credential setup — In-App Calling uses application-scoped auth (Application Key + Application Secret).

Integration workflow