Proton Calendar for iOS

Proton Calendar is a free mobile application designed for secure event management, leveraging end-to-end encryption to protect user data. Developed by Proton Technologies, the app allows users to record appointments and important dates while ensuring that only they can access their information. The application syncs seamlessly across devices, making it easy to keep track of schedules anywhere you go. Currently, it is available exclusively for paid users of ProtonMail and ProtonVPN, as it remains in beta testing.

The application offers robust features for organizing events, including support for up to 10 different calendars, which can be used to separate personal and professional commitments. Users can set recurring events, manage notifications, and even schedule appointments across various time zones. Additional functionalities include the ability to migrate existing events from other calendar applications and add emojis for personalization. With no advertisements or trackers, Proton Calendar emphasizes user privacy and security, aligning with the standards set by other Proton services.