Kalenderchen

Kalenderchen is a straightforward and clear appointment calendar designed with a strong emphasis on privacy and data protection. It features optional multi-device synchronization secured with end-to-end encryption, ensuring your data remains confidential. Hosting its own calendar cloud infrastructure on German servers, Kalenderchen operates independently of major providers, reinforcing user privacy.

Appointments are securely stored on the device in isolated databases, preventing unauthorized access by other apps, even those requesting calendar permissions. The app does not require personal information to create a sync account and is entirely free of advertisements. Kalenderchen supports multiple calendar accounts such as business, family, and clubs, and offers features like public holidays for Germany, Austria, and Switzerland, annual appointments with age calculation, categorized appointments visibility, and an integrated, organized to-do list. Synchronize effortlessly across devices, including popular Windows PC calendar versions. Experience a privacy-first scheduling tool that keeps your data secure and organized.