Im having a calendar inside my app and it is possible to synchronize that calendar with the apple calendar app on iOS (it then automatically synchronizes with icloud if enabled).
Now I want the same for the google calendar app on iOS but all I could find for now is the google calendar web API. The problem: you need to be online for that but my App should have a full offline support. So I thought maybe it would be possible to access the iOS google calendar app installed on the device to add / remove / modify events.
Is it possible to do so or is there now API for the iOS google calendar app?