Proton Calendar
ProtonCalendar

Your schedule is worth protecting

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

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Need a secure calendar for work? Discover Proton for Business

  • Accounts

    >100 million

  • App rating
    4.5
  • Swiss-based

The world’s largest encrypted calendar service

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 privacy

Proton is incorporated and headquartered in Switzerland. This means all user data is protected by strict Swiss privacy laws and Swiss neutrality.

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.

See all security features

Proton Calendar helps you make the most of your day

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.

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Get it on Google Play
Download on the App Store

One account for all your Proton services

Choose an internet where your privacy comes first.

Create a Proton account to get free access to all Proton services, including our encrypted email, calendar, file storage, VPN, and much more.

Create Free Account

Protect your communications with user-friendly encrypted email.

Save time scheduling and stay organized with shared calendars for you and your family.

Collaborate securely, share large files, and back up your data automatically.

High-speed VPN that allows you to bypass censorship and other content restrictions.

Securely store, share, and auto-login to your accounts using end-to-end encryption.

Choose a wallet that’s transparent, open source, and puts you in control.