From user netlogic on the Expo forums: https://forums.expo.io/t/any-plans-to-support-interfacing-with-phones-calendar/1297/1

"My question is that my app reads the phone's calendar and also add events to it.

Is there any support planned for normalizing EKEventStore (iOS) and Calendar Provider (Android) into a calendar interface?

Thank you again,

Bret

PS Below is the link for react-native-calendar-events which has a clean interface.

A good example to review.

https://github.com/wmcmahan/react-native-calendar-events"