CallKit

Build VoIP calling features that integrate with the native iOS call UI using CallKit and PushKit. Covers incoming/outgoing call flows, VoIP push registration, audio session coordination, and call directory extensions. Targets Swift 6.3 / iOS 26+.

Contents

• Setup
• Provider Configuration
• Incoming Call Flow
• Outgoing Call Flow
• PushKit VoIP Registration
• Audio Session Coordination
• Call Directory Extension
• Common Mistakes
• Review Checklist
• References