ProtonBlog(new window)

A calendar is more than just a tool. It’s a record of the moments that make up your life — your big meetings, gatherings with friends, and children’s birthdays. For the longest time, to easily organize these events, you had to let large corporations monitor these special moments. These companies snoop on your calendar and use that information to inform their advertising.

Proton Calendar(new window) is the first fully encrypted calendar app. You can use it to keep track of your plans and appointments while keeping your data private. 

Proton Calendar uses end-to-end encryption to keep all your events’ sensitive information private and secure. The event title, description, location, and participants for every event are encrypted on your device before they reach our servers, so that no third party (including Proton Mail) can see the details of your events. Only you will know your plans.

If you are a Proton Mail or Proton VPN user with a paid plan, you can start using the Proton Calendar beta right now. Simply log in to your Proton Mail account using the Proton Mail Version 4.0 beta, and you will see Proton Calendar on the sidebar:

If you don’t have a paid Proton Mail account yet, you can sign up here:

If you don’t see the Calendar icon (below) in the left menu, you might need to refresh the page.

Paid users can also download the beta version of the Proton Calendar app for Android from the Google Play Store.

Proton Calendar takes Proton into the future

It’s no secret that we’re creating privacy-focused alternatives to the online services you use every day. Proton Calendar is the next step in this process. Our calendar takes a comprehensive approach to user data security. No other calendar keeps as much data private as Proton Calendar. As our thorough security model(new window) demonstrates, we worked hard to ensure that you have all the convenience you need from a calendar app along with the security and privacy you expect from Proton.

With Proton Calendar, you can now quickly arrange your life and plan your events in a convenient, secure way. It uses the same end-to-end encryption that Proton Mail does, ensuring that no one, not even Proton Mail, can access your schedule except you.

Image of ProtonCalendar web app

Our calendar stops private companies from spying on your schedule. For our users with heightened security needs, Proton Calendar will prevent authoritarian regimes from seeing who you are meeting with and what you are doing. It does this by keeping the details of all your events encrypted while they are stored on our servers. Even in the unlikely event of a breach, your agenda will remain secure.

Currently, you can use the Proton Calendar beta to manage up to 10 calendars. You can create and delete events, set reminders, and schedule, edit, or delete events that repeat every day, week, month, or on custom days.

Proton Calendar is just the latest project in our mission to create a more private Internet. A calendar app has been one of our most requested products — pairing a secure calendar with a private inbox dramatically increases the utility of both. And soon, you will be able to privately save and share documents to the cloud with ProtonDrive. Our mission is to create an Internet that serves you and doesn’t require you to hand over your personal data to governments or corporations.

Looking ahead

The current iteration of Proton Calendar is an early beta. There will be substantial developments between now and when the project is publicly released. Over the course of the beta, additional features will be added such as the ability to share your calendar with other Proton Mail users and send event invites to anyone, even non-Proton Mail users. It will also make scheduling as easy as a single click by letting you sync events in your Proton Mail inbox with Proton Calendar.

Proton Calendar is now available for Android and in the web version of Proton Mail. We will also be releasing a Proton Calendar app on iOS in the near future.

While we are excited to release the Proton Calendar beta today to get initial feedback from the community, we realize there is still work to be done. We look forward to receiving and incorporating your input so that Proton Calendar can meet all of your calendar needs.

We believe everyone has the right to plan dinner with friends without announcing to Google who will attend. For that reason, once Proton Calendar is publicly released, a basic version will be available to all Proton Mail users (including Free users) while paid Proton users will benefit from additional functionality.

Your feedback matters

Our community has always been one of our greatest strengths, so we are again turning to you for help. Your feedback will greatly assist us in making improvements to Proton Calendar, optimizing its design and giving you the private and secure calendar app you want.

During the beta, you can reach us with any feedback on Proton Calendar via our bug report feature inside the web app. 

screenshot of the bug report feature

You can also follow Proton Calendar development via a dedicated Proton Calendar Twitter(new window) account and the new Proton Calendar subreddit on Reddit(new window)

Stay organized and protect your schedule from being spied on with Proton Calendar.

Best Regards,
The Proton Team

You can get a free secure email account from Proton Mail here.

We also provide a free VPN service(new window) to protect your privacy.

Proton Mail and Proton VPN are funded by community contributions. If you would like to support our development efforts, you can upgrade to a paid plan or donate. Thank you for your support.

Keep your life’s events private
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