Add ical url to local calendar

We have a sporting event/activity app where teamleaders/trainers can administer matches, trainings etc for their players and parents.
We want to add these events to the local calendar of the phone and have tested the native calendar plugin.
We want to provide these events via a ical-feed that is available at our back-end but I cannot find any good resources on how to accomplish this in Ionic?
The reason why we want to use a ical-feed and not doing synchronizing through the app code is that we want the calendar to be updated with changes without having to start the app.

Does anyone have any insights on the matter which can help us in the right direction?