About
Proton Calendar is a privacy-focused calendar app that keeps your schedule encrypted and private. View upcoming events in agenda or day view, manage invites from your Proton Mail inbox, and create recurring events on daily, weekly, monthly, yearly, or custom schedules. All event names, descriptions, and participant information are protected by end-to-end encryption—the same technology used in Proton Mail. The app includes multiple reminders per event, light and dark mode, and syncs across all your devices. There are no ads, trackers, or data harvesting; Proton is based in Switzerland and operates under strict Swiss privacy laws.
Highlights
- End-to-end encryption for event names, descriptions, and participant information
- Agenda and day view options with light and dark mode
- Recurring events on daily, weekly, monthly, yearly, or custom schedules
- Multiple reminders per event and automatic sync across devices
- Events and invites automatically imported from Proton Mail inbox
- No ads, trackers, or data harvesting; Swiss privacy law protection
Best for
Journalists, privacy-conscious professionals, and organizations that need to keep their schedules confidential. Anyone using Proton Mail who wants their calendar encrypted with the same security standard.
At a glance
Proton Calendar: Secure Events is rated 3.4 out of 5 from 627 ratings and is available on iOS and Android — all free to download.
It is developed by Proton AG.
Screenshots
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