The app crashes or won't open

If Calendar Op.2 crashes, freezes, or won’t open, the quickest fix is to delete and reinstall it:

1. Press and hold the Calendar Op.2 icon → Remove App → Delete App.
2. Reinstall it from the App Store.

Your events are safe. Because all data lives in the iPhone’s built-in Calendar, deleting and reinstalling Calendar Op.2 does not delete any events — they’ll be right there when you reopen the app. (You’ll be asked to allow calendar access again; choose Full Access.)

If the problem continues, please contact us with your iPhone model and iOS version so we can look into it.