First, you will need to create an export for the desired calendar as described in Exports Create and Edit.
Once the calendar export is created, copy the generated URL from the iCalendar URL column.
Make sure to send the copied URL to your iPhone device. If you are on using Mac you can copy-paste it otherwise send it . Otherwise, send the copied URL via any messenger or by email, and copy it to the clipboard on the iPhone.
On iPhone, open Settings and click Mail and . Then, click Accounts.
Next, click Add Account and then . Then, choose Other.
Select Add Subscribed Calendar , and paste the previously copied URL. Click Next, click Next and then Save.
After this you Once the above steps are complete, open the Calendar app in your iPhone, and verify that the subscribed calendar is present and tickedchecked. The events from the exported calendar should appear in the calendarCalendar app.
If you need to adjust the calendar refresh rate frequency please navigate to Settings -> → Mail -> → Accounts -> → Fetch New Data and adjust update the Fetch section.
