Proton Calendar: Secure Events

Proton Calendar: Secure Events is a privacy-first calendar and schedule planner designed for people who value their personal time and data security. Unlike conventional calendar apps that monetize your scheduling habits, this app keeps your events completely private while delivering powerful time-management features you need every day.

Your schedule syncs seamlessly across all your browsers and devices, so you're always in sync whether you're planning from your phone, tablet, or computer. Create recurring events on any cadence—daily, weekly, monthly, yearly, or custom intervals—and switch effortlessly between daily planner and monthly planner views to match your workflow. Need to coordinate across time zones? Set appointments in any local or foreign time zone without confusion. With support for up to 20 calendars (a premium feature), you can organize work, personal commitments, health appointments, and more in separate streams while viewing them together.

Stay organized with multiple reminders per event, ensuring nothing slips through the cracks. Check your upcoming agenda directly from your home screen using the Proton Calendar widget, and personalize your experience with dark mode or light mode viewing options. Whether you're managing a packed schedule or planning weeks ahead, you have the flexibility and visibility you need.

What sets this apart is the absolute privacy guarantee. There are no ads, no trackers, and zero data sharing with third parties. Your event names, descriptions, and participant information are encrypted end-to-end, meaning they stay encrypted during transit between users and on Proton's servers—even Proton itself cannot access your data. This zero-access encryption model ensures complete control over your sensitive scheduling information. All data is protected by Swiss privacy law, one of the world's strongest legal frameworks for data protection.

Proton Calendar is built by the same scientists and engineers who created Proton Mail at CERN and MIT, and it's used by journalists, organizations, and privacy-conscious individuals worldwide. The app is funded by users, not advertisers, making privacy the core business model rather than a marketing claim. It's fully GDPR and HIPAA compliant, meeting the highest international standards for data handling.

Choose Proton Calendar: Secure Events and reclaim ownership of your schedule without compromise.