I built an expo-module that makes it easy to integrate CallKit/Core-Telecom into a React Native app. I ve built a VoIP app before and this was one of the hardest parts. The existing react-native-callkeep is harder to use, isn t easy to set up VoIP notifications with and hasn t been updated in two years. This new module is tested with the latest versions of iOS/Android, Expo and LiveKit. It has a simple and unified API across iOS/Android.