Watch the Video, then On Your iPhone/iPad:
1. Launch the Settings app from the Home screen of your iPhone or iPad.
2. Tap on Mail, Contacts, Calendars.
3. Under the Mail section, tab on Add Account....
4. Now tap on Other.
5. Under the Calendars section tap on Add Subscribed Calendar.
6. Enter your provided URL from the My Settings tab and tap Next
7. When you are finished, tap on the Done button in the upper right hand corner.
8. That's it, the subscribed Calendar will now show up in your Calendar app.