Proton calendar

Your schedule is worth protecting

Your calendar is a record of your life. Proton Calendar helps keep it private.

Need a secure calendar for work? Discover Proton for Business.

Images of the Proton Calendar web app and the Android app in dark mode.
Images of the Proton Calendar web app and the Android app in dark mode.
Illustration showing Proton Calendar's multiple layers of secure encryption.

Make every day safer with end-to-end encryption

Proton Calendar automatically secures all your events with end-to-end encryption. Events received from people who use other calendars are secured with zero-knowledge encryption.
In both cases, event details, including the title, description, location, and people invited, are encrypted so not even we can see them.

All the features you expect, plus privacy

Proton Calendar makes staying on top of your schedule simple while keeping your information secure.

Free calendar

Everyone has the right to privacy, which is why we make Proton Calendar available for free. To access more features and support our fight for a better internet, upgrade to a paid account.

Your data, your rules

Proton Calendar is a calendar that respects privacy and puts people (not advertisers) first. Your data belongs to you, and our encryption ensures that.
Swiss Flag

Swiss privacy

Proton is incorporated and headquartered in Switzerland. This means all user data is protected by strict Swiss privacy laws and Swiss neutrality.
Images of the Proton Calendar Android app.
Proton calendar

Proton Calendar was built by the team behind Proton Mail, the world’s largest encrypted email service


Over 70 million people and some of the world’s largest organizations have signed up with Proton.

Get it on Google Play

Get more from Proton Calendar when you use Proton Mail

Proton Calendar comes with a Proton Mail email address that you can use to securely send event invites. You can also add events to Proton Calendar directly from your Proton Mail inbox.

Proton Mail and Proton Calendar use end-to-end encryption to secure your data.

Proton Calendar helps you make the most of your day

With Proton Calendar, you can quickly add events, modify invitations, and set multiple reminders, meaning you can spend less time managing your schedule and more time on the things that matter.

Import your existing calendar to Proton Calendar with only a couple of clicks to get started.

Choose an internet that respects your privacy


Create a Proton account to get free access to all Proton services, including our encrypted email, calendar, file storage, VPN, and much more.
Proton Mail
Keep your conversations private. Proton Mail is encrypted email based in Switzerland.
Proton Drive
Securely access and share your files from all devices, from anywhere in the world.
Proton VPN
Keep your internet activity private and secure, and access censored content with our high-speed VPN.