If your Pro purchase isn’t working on your device—for instance, after installing Calendars on a new device—start with making sure you're signed into the Apple ID you've used to buy Calendars. If it's the same and the issue persists, here are the steps you can try:
- Open the Calendars app.
- Click Calendars in the top left of your screen.
- Go to Preferences.
- Scroll down and click Restore In-App Purchases.
If that doesn’t solve it, try this:
- Open the App Store.
- Click Store at the top right.
- Scroll down and click Sign Out.
- Restart your device.
- Sign back in to your App Store account.
- Open the Calendars app again, go to Preferences, and click Restore In-App Purchases.
- Open the Calendars app.
- Tap the menu icon (three lines) in the top left (skip this step on iPad).
- Go to Settings.
- Scroll down and tap Restore In-App Purchases.
If that doesn’t help, try this:
- Open the App Store.
- Tap your Account icon in the top right.
- Scroll down and tap Sign Out.
- Restart your device.
- Sign back in to your App Store account.
- Open the Calendars app again, go to Settings, and tap Restore In-App Purchases.