Proton Calendar - Private and secure calendar APK for Android

Proton Calendar is a free mobile application designed for secure event management. Developed by Proton Technologies, this app utilizes end-to-end encryption to protect personal information, ensuring that only users can access their data. It allows synchronization across multiple devices, making it easy to manage schedules on the go. Currently, Proton Calendar is in beta and is exclusively available for paid users of ProtonMail and ProtonVPN.

The app features robust organizational tools, including support for managing up to ten separate calendars, which can help users categorize events for work, family, or personal use. Users can set recurring events, add multiple notifications, and manage appointments across different time zones. Furthermore, Proton Calendar allows for the migration of existing events from other calendar apps, making transitions seamless. With no ads or trackers, it emphasizes user privacy while offering essential calendar functionalities.