Guide for iPhone and iPad
Add calendar subscription in iOS
Step 1
Open iOS settings and in the sidebar click on Calendar. Click on Account and then click on Add Account.
Step 2
From the list that appears, click on Other.
Step 3
Click on the last item Add Calendar.
Step 4
In the popup that appears, enter the link of the calendar and click Next. Enter the description of the calendar and click on Save. The calendar will now be visible in the iOS calendar app.