Proton Calendar: Secure Events

In-app purchases
4.4
3.85K reviews
500K+
Downloads
Content rating
PEGI 3
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About this app

Proton Calendar is an easy-to-use planner and a time-management tool that keeps your schedule private

Additional Highlights
✓ Schedule planner syncs automatically across browsers and devices
✓ Create recurring events on a daily, weekly, monthly, yearly, or custom basis
✓ Use as an appointment scheduler in local or foreign time zones
✓ Manage up to 20 calendars (paid feature)
✓ View your agenda from the home screen with the Proton Calendar widget
✓ Add multiple reminders for any event
✓ Use as a daily planner or monthly planner by switching between different views
✓ Choose to view your event schedule in dark mode or light mode

PRIVATE CALENDAR
✓ No ads, no trackers, and no data sharing with any third parties
✓ We can’t spy on your activities or misuse your data
✓ End-to-end encryption — fully encrypted data exchange between Proton Calendar users
✓ Zero-access encryption — event names, descriptions, and participants are encrypted on our servers
✓ Based in Switzerland 🇨🇭 — All your data is protected by strict Swiss privacy laws

USERS FIRST
Building an internet that puts people ahead of profits
✓ Funded by users, not advertisers — privacy is our business model
✓ Built by scientists and engineers who met at CERN and MIT and founded Proton Mail
✓ Used by high-profile journalists and organizations globally
✓ GDPR and HIPAA compliant
✓ Based in Switzerland and protected by some of the world’s strongest privacy laws

What others say about Proton Calendar
“Proton Mail has now made it stupid-easy to encrypt your schedule. Information about what you plan to do, where, and with whom, can be just as sensitive as the messages you send and receive.” Gizmodo
Updated on
23 Dec 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info and 5 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.3
3.7K reviews
Play LGL50
26 October 2024
I'm using it for some months now, and I like it very much!! I just miss the function of taking notes, for which I created a recurring monthly event. I'd like to inform two issues, that occurs on my old Android 8.1: 1) It's possible to just "swipe out" a reminder notification by accident; instead, you could, e.g., need to touch the notification and confirm reading. 2) After restarting the phone, any reminders notifications that were on the screen will not return. Thanks for all the Proton apps!
47 people found this review helpful
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Proton AG
1 November 2024
Hi! Thank you for the follow-up! Could you report these issues to us at https://proton.me/support/contact or directly through the "Report a problem" feature in the app so we can investigate?
Conor McKenzie
22 November 2024
Is a good, functional replacement for Google calendar. However, there are a few things I miss from Google Calendar: (1) instant loads; sometimes with proton calendar I have to wait 5-10 seconds to load the calendar and then 10 more seconds to load individual events (2) ability to drag and drop events to change start time (3) no lag; in proton Calendar's week view with over 100 events per week it lags noticeably when changing from one week to the next. Edit: clearing cach does not improve it.
7 people found this review helpful
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Proton AG
29 November 2024
Hi! Thank you for your feedback - we've shared it with our team. Could you try clearing the app data by navigating to your device's settings → Apps → Storage → Proton Calendar→ Clear data/cache (Note: this will log you out) to see if this helps the slow behavior of the app? Edit: Please report this via the "Report a problem" feature in the app.
Fay Knol
22 February 2024
Would have loved to use this calendar unfortunately the app is lacking a lot of basic features like search. Great UI though and I'd love to switch to it in the future; I especially love the multiple calendars so I can easily categorize what thing has what color without needing to figure out my own system.
2 people found this review helpful
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Proton AG
22 February 2024
Hi Bavo. Thank you for the feedback. We’ve received this request before and we’ll add your vote so our development team can prioritize this in a future update. We don’t have an ETA on when this may be implemented, but stay tuned for updates!