Proton Calendar Review, Pricing, Features with Pros and Cons

In this Proton Calendar review, you'll find more information about its features, pricing, pros and cons and why you should consider using it.
9.4/10 (Expert Score)
Product is rated as #1 in category Calendar
9.4Expert Score
Your schedule is worth protecting

Step into the future of digital scheduling with Proton Calendar, where your plans are not just organized but also encrypted. Experience the peace of mind that comes with Swiss-grade security features, seamless integration with ProtonMail, and an intuitive user interface. Whether it’s a confidential business meeting or a personal event, Proton Calendar ensures it stays private, making it the ultimate choice for those who take their privacy seriously !

Customer support
Value for money
Ease of use
  • Swiss Jurisdiction
  • Seamlessly integrates with ProtonMail
  • Easy to use
  • Intuitive interface
  • Robust security
  • Only available to ProtonMail users
  • Limited features

Are you on a quest for a calendar that does more than just remind you of your dentist appointment?

Enter Proton Calendar—the secure scheduling tool that’s not just about organizing your life, but also about protecting it. With end-to-end encryption and Swiss-grade privacy features, Proton Calendar is the Fort Knox of digital planners.

Read further to learn more about Proton Calendar, in our review we will detail its features, pros and cons with our rating, and a conclusion about why you should use it.

Click on “open” if you want to see exactly what we will talk about in the rest of this article.


What is Proton Calendar?

Proton Calendar is a privacy-focused scheduling tool that offers end-to-end encryption for all your events.

Developed by the team behind ProtonMail, the world’s largest encrypted email service, the software is designed to keep your schedule secure while offering all the standard features you’d expect from a calendar app.

It’s available on Web, Android, and iOS platforms. The calendar respects user privacy by adhering to strict Swiss privacy laws, as the company is headquartered in Switzerland.

Events received from people using other calendars are also secured with zero-knowledge encryption, ensuring that even the company itself cannot access the event details.

Proton calendar cover

Proton Calendar is free to use, but additional features can be unlocked with a paid account. It integrates seamlessly with ProtonMail, allowing you to send secure event invites and manage your schedule directly from your email inbox.

Proton Calendar specifications

FeaturesAd-Free Experience / Contact management / Control Access And Secure Data / Customizable Reminders / Customizable interface / Customization / End-to-End Encryption / Integration with Proton Mail / Personalization / Recurring Events / Share with Your Team / Shared Calendars / Subscription to Other Calendars / Swiss Privacy Laws / Synchronization Across Devices / Various viewing options
Best suited forIndividuals, Freelancers, Small businesses
Website languagesDeutsch / English / French / Italian / Nederlands / Polsky / Portuguese / Română / Russian / Spanish / Turkish
Website URLVisit official website
Support linkSupport page
Live chatNo
Company addressSwitzerland
Year founded2014


Proton Calendar pricing: How much does Proton Calendar cost?

The calendar is not offered as an independent free service. Its availability is tied to your ProtonMail subscription. When you subscribe to any ProtonMail plan, Proton Calendar is automatically included as part of your package.

Find below the pricing plans for ProtonMail, which also grant you access to Proton Calendar !

Pricing rangeFrom $0 per month
Pricing typesFree
Free planYes
Free trialNo
Money back guaranteeYes, 30 days
Pricing page linkSee plans

Proton Calendar pricing plans


Proton Free

    • $0 per month
    • Up to 1 GB total storage
    • 1 free email address
    • 150 messages per day
    • 3 Calendars
    • Sync across devices
    • Encrypted file sharing

Mail Plus

    • $4.99 per month
    • 15 GB total storage
    • 10 email addresses
    • Unlimited messages
    • Support for 1 custom email domain
    • 25 Calendars
    • Calendar sharing
    • Sync across devices
    • Encrypted file sharing

Proton Unlimited

    • $12.99 per month
    • 500 GB total storage
    • 15 email addresses
    • Unlimited messages
    • Support for 3 custom email domains
    • Unlimited folders, labels, and filters
    • 25 Calendars
    • Calendar sharing
    • Sync across devices
    • Encrypted file sharing

Note: All plans come with additional features like VPN connections and hide-my-email aliases.


Proton Calendar features: What can you do with it?

Each feature is meticulously crafted to offer you not just a scheduling tool, but a secure haven for your plans and appointments.

From end-to-end encryption that ensures your events remain your own, to seamless cross-device synchronization for on-the-go access—Proton Calendar’s features are designed to redefine your expectations from a calendar app.

Cross-Device Synchronization

Proton calendar devices

Proton Calendar ensures that your schedule is consistent across all your devices. Whether you’re using a web browser, Android phone, or iOS device, your calendar entries are automatically updated.

This eliminates the need to manually sync your events, providing a hassle-free experience.

Integration with Proton Mail

Proton calendar proton mail integration

This feature allows for a more streamlined management of your schedule and email. If you receive an email invitation for an event, you can directly add it to your Proton Calendar without leaving your ProtonMail inbox.

This is particularly useful for quickly adding business meetings, flight schedules, or concert tickets that you receive via email.

Multiple Views

Proton calendar views

To help you manage your time more effectively, Proton Calendar offers various viewing options. You can choose to see your events in a daily view for detailed planning, a weekly view for a broader outlook, or a monthly view to get a high-level overview of your commitments.

Recurring Events

Proton calendar recurring events

For events that happen regularly, like weekly meetings or monthly bill payments, the calendar allows you to set them up as recurring events. You can customize the frequency of these events to be daily, weekly, monthly, or even set up a custom recurrence pattern.

Customizable Reminders

Proton calendar custom reminders

You can set up multiple reminders for each event to ensure you never miss anything important. These reminders can be in the form of in-app notifications or email alerts. The flexibility in setting reminders allows you to choose what works best for you.


Proton calendar personalization

Proton Calendar offers various themes to suit your aesthetic preferences. Whether you prefer a dark mode for better visibility in low light or a high-contrast mode for readability, you can customize the calendar’s appearance to fit your needs.

End-to-End Encryption

Proton calendar end to end encryption

Security is a major focus of Proton Calendar. All your events are encrypted on your device before they are uploaded to the server. This means that nobody, not even Proton, can access your event details unless you give them permission.

Ad-Free Experience

Unlike many other free calendar services that rely on ads for revenue, Proton Calendar offers an ad-free experience. This ensures that your scheduling is not only private but also uninterrupted by distracting advertisements.

Proton calendar separate calendar

Controlled Access

You have the ability to control who can see your calendar and to what extent. You can grant full access, which allows someone to see all event details, or limited access, which only shows when you are available. This is useful for both personal and professional scheduling.

Shared Calendars

Proton calendar share

This feature allows you to share your calendar with others. You can generate a link to your calendar and share it with family, friends, or colleagues. You have the option to show either your full calendar or just your availability, providing flexibility in how you share your time.

Subscription to Other Calendars

Proton calendar everyone

You can also subscribe to calendars from other services. This is particularly useful for families or work teams who may be using different calendar platforms but still need to coordinate schedules.

Contact Management

Proton calendar contact management

The Contacts widget in Proton Calendar allows you to manage your contacts without leaving the calendar interface. You can add new contacts, remove outdated ones, merge duplicate entries, and even import a list of contacts. This feature also allows you to directly add these contacts to any event, making the process of sending invites more efficient.


Proton Calendar review: Why you should use it?

If you’re looking for a calendar application that prioritizes your privacy and security, Proton Calendar is the go-to option. With its end-to-end encryption and Swiss jurisdiction, you can be assured that your data is in safe hands.

The calendar offers end-to-end and zero-access encryption for all your events, making it a robust choice for those concerned about privacy.

However, it’s worth noting that the calendar is still in its early stages, and some users have pointed out the need for more features and integrations. In the end, its tight integration with ProtonMail makes it a convenient choice for existing users.

Pros and Cons


  • High-Level Security: End-to-end and zero-access encryption for all data.
  • Swiss Jurisdiction: Operates under stringent Swiss privacy laws.
  • User-Friendly: Easy to use and intuitive interface.
  • Integration: Seamlessly integrates with ProtonMail.


  • Limited Features: Still in the early stages, lacking some advanced features.
  • No Free Standalone Version: Only available to ProtonMail user


Frequently Asked Questions

Proton Calendar Review, Pricing, Features with Pros and Cons
Proton Calendar Review, Pricing, Features with Pros and Cons

Proton calendar review
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9.4 / 10