Proton Calendar: Secure Events

Proton AG

In-app purchases

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

Ratings and reviews

I love what Proton stands for. I've had great experience with their other services. However, the calendar app is not reliable. Events are not reliably syncing from the web app on my PC to the android app. Thus, I'm not receiving notifications and I'm missing important events. I've spoken with support, which was fast and thorough. I hope they get this fixed soon; I want to use this product. Edit: I identified the issue and found a fix.

This app is great! Another successful private alternative to Google's software. The only thing that I would like is the ability to import things other than events from Google calendar, such as reminders, and the ability to create reminders in the app similarly to Google's calendar app. All in all, it's a n excellent calendar app. It displays events really well. I'd just like the ability to add reminders which can be crossed off upon completion.

It gets buggy pretty frequently and only uninstalling and reinstalling fixes the issue. It's like it won't load; the app hangs when you go to open it, or it hangs trying to load the calendar or it doesn't load all the features when you're trying to add an event. I'm really enjoying it and I use it a lot on my laptop, to the point that it's worth me just uninstalling and reinstalling, but it's not reliable yet. As an aside it would be nice if a calendar color could be bright brick red.

What’s new

Minor fixes and improvements.