Proton Calendar is an application that allows users to easily manage their schedules and appointments. It offers a variety of features such as automatic syncing across devices and browsers, the ability to create recurring events, and the option to view your agenda from the home screen with a widget. Users can also add multiple reminders for each event and switch between different views to use the app as a daily or monthly planner. Additionally, users have the option to view their schedule in either dark or light mode. One of the standout features of Proton Calendar is its emphasis on privacy. The app offers a private calendar option with no ads, trackers, or data sharing with third parties. This means that the user's activities and data are not being monitored or shared. The app also uses end-to-end encryption for data exchange between Proton Calendar users and zero-access encryption for event names, descriptions, and participants on their servers. This ensures that all user data is fully protected. Proton Calendar is also committed to putting its users first. It is funded by users rather than advertisers, making privacy their main priority. The app was created by scientists and engineers who met at CERN and MIT and founded Proton Mail. It is used by high-profile journalists and organizations globally and is compliant with GDPR and HIPAA regulations. The app is based in Switzerland, which has some of the strongest privacy laws in the world. The app has received positive reviews, with Gizmodo stating that Proton Mail has made it "stupid-easy" to encrypt your schedule. They also highlight the importance of protecting sensitive information such as plans and appointments. With its user-first approach and strong emphasis on privacy, Proton Calendar is a reliable and secure option for managing your schedule.