Definition

CallKit is Apple’s framework for integrating VoIP and communication apps with the native iOS calling experience.

It allows apps like:

• WhatsApp
• Telegram
• Discord
• Zoom

to behave like real phone calls inside iOS.

Why CallKit Exists

Before CallKit:

• apps built completely custom call UIs
• incoming calls were inconsistent
• lock screen support was unreliable
• Bluetooth/audio routing behavior varied

CallKit standardized communication app behavior across iOS.

What CallKit Provides

CallKit provides:

• native incoming call UI