How do I install a Premium Calendar?

Premium Calendars are bought via so-called in-app Purchases:

  1. Select the Calendar you wish to install
  2. Tap on the blue (+) buttton
  3. If you get a 'Could not connect to the iTunes Store' error, please try again
  4. Enter your App Store Details
  5. The purchase will now be processed by Apple
  6. Once the purchase has been confirmed by Apple, a popup will show up to install the calendar
  7. Follow the on-screen hints to install the calendar