Tap the "Settings" icon, then scroll down and select "Mail, Contacts, Calendars."
Tap "Add Account" and select "Other."
Select the "Add Subscribed Calendar" option, fill in The Crew Gig Calendar URL in the Server box and click "Next." Change any settings you see fit before saving the calendar. You do not need a username or password.
Toggle your view of the subscribed calendar by opening the Calendar app and tapping "Calendars" in the upper left corner. Tap a calendar name to either display or remove calendar events.
On an Android Phone
Open Google Calendar.
On the left side, find "Other calendars" and click the down arrow.
Select Add by URL.
Enter The Crew Gig Calendar URL in the field provided.