Proton Calendar: Secure Events

In-app purchases
4.3
5.33K reviews
500K+
Downloads
Content rating
Everyone
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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
2 Sept 2025

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

4.4
5.12K reviews
Jaye Leigh Kittenz
8 September 2025
No tasks, no search feature, and can't see list of upcoming events at a glance (agenda view only shows the day you select). If those features were added, I could finish fully removing Google from my life, which is my greatest wish! And if you want to really surpass Google, allow event list filtering by type (Birthdays, Anniversaries, Custom).
1 person found this review helpful
Did you find this helpful?
Proton AG
9 September 2025
Hi! Thank you for the honest review Jaye! The features you've mentioned are on our roadmap. Keep an eye on our social media channels for updates.
Lori
2 September 2025
I was liking this app but have discovered that #1) I can no longer get repeating monthly events scheduled where they actually appear in the 1st month they start. #2) Events from prior month(s) disappear so I no longer have any history to refer to. (Extremely annoying!) If these can be fixed I'll resume using but otherwise I have to use something else. Sad part is I pay annually for Proton.
Did you find this helpful?
Proton AG
3 September 2025
Hi. Thank you for your honest review and feedback. You can set custom recurring events occurring on the first of every month on the web app at https://calendar.proton.me/. We'll share your suggestion for the ability to have past events shown in the calendar with the team.
Sandra Christie
3 September 2025
Overall, I’ve been really happy with the Proton system—it works great on most of my devices. But after the latest update on my Samsung Android phone, I can’t add new calendar events. Tapping the “+” opens a blank screen where the title bar covers everything. I end up typing blindly, and I can’t properly edit titles later either (though times still work). On desktop everything is fine, so it seems to just be an Android issue from the update.
Did you find this helpful?
Proton AG
4 September 2025
Hello! Thank you for the 4-star rating! The team is aware of this behavior and is working on a fix. In the meantime, can you try clearing the app's data from your device's settings → "Apps" → "Proton Calendar" → "Storage" → "Clear local cache/data" and let us know if that resolves the issue?

What's new

Minor fixes and improvements.