: On newer iOS versions, you can take a screenshot of a contact or event listing in the app, and the system can automatically suggest adding it to your calendar. Calendar - App Store - Apple

: It is recommended to download the official app from the App Store to ensure automatic updates and secure data handling.

: While some users seek "IPA" files for manual installation, these typically require third-party tools to sideload and may lack the security of the official version.

: Add Das Telefonbuch or generic calendar widgets to your home screen to see upcoming appointments synced from the directory.

: Once installed, the app allows you to share or export contact "vCards" or calendar ".ics" files, which are natively supported by iPadOS and iOS. Advanced Management Tools