- Encryption: Protect event details with Proton’s privacy architecture.
- Calendar sharing: Share calendars and events with other users.
- Proton ecosystem: Paid access can be bundled with Proton Mail, Drive, VPN and Pass.
- Web and mobile: Use Proton Calendar across supported web and mobile clients.
- Privacy focus: Designed for users prioritizing control over event data.
Proton Calendar
End-to-end encrypted calendar built for privacy-first scheduling
Updated August 11, 2026
Proton Calendar Overview
Proton Calendar is an encrypted calendar in Proton’s privacy-focused product family. Its design protects event details while still supporting the everyday work of creating, editing and viewing a schedule.
Users can share calendars and events with other people through supported web and mobile apps. It also works alongside Proton Mail and the company’s other privacy tools for people who want those services in one ecosystem.
Key Features
Pricing
| Plan | Price | Featured |
|---|---|---|
| Free | $0 | Encrypted calendar with core Proton Calendar access |
| Proton Unlimited | $9.99/month billed yearly | Calendar bundled with Proton Mail, Drive, VPN and Pass; paid bundle pricing, not a calendar-only price |
The paid amount belongs to Proton Unlimited, not a calendar-only plan. The free calendar remains available without buying that wider bundle.
Pricing source: Proton plans
Pros
| Compared with | Why this product may fit better |
|---|---|
| Google Calendar | Google Calendar takes a different route. Proton Calendar is designed around encrypted event data and a business model that is not funded by advertising. Privacy-conscious users can keep a familiar calendar process without placing the same amount of schedule information inside Google’s ecosystem. |
| Apple Calendar | If Apple Calendar is on the shortlist, Proton provides a privacy-focused account that is not tied to Apple hardware. That gives people using a mix of phones and computers a more portable encrypted calendar identity than a process built mainly around iCloud devices. |
| Tuta Calendar | Next to Tuta Calendar, the free Proton account connects the calendar to a wider family of privacy tools, and paid bundles can add Mail, Drive, VPN and Pass. Buyers already interested in that suite may find the combined account more useful than selecting a standalone encrypted calendar. |
Cons
| Compared with | Where this product may fall short |
|---|---|
| Google Calendar | Google Calendar remains stronger for broad collaboration, integrations and features that depend on a large workplace ecosystem. Proton’s privacy advantage does not erase process gaps for teams that schedule through Google Meet, shared resources or third-party business apps. |
| Apple Calendar | In practical terms, Apple Calendar is deeply integrated with iPhone, Mac, Siri and the system share experience without requiring another subscription bundle. People who stay entirely inside Apple’s ecosystem may find Proton’s cross-platform privacy benefits less important than native convenience. |
| Tuta Calendar | Tuta Calendar is a direct privacy-first alternative and may appeal to buyers who want a smaller encrypted mail-and-calendar package. Proton’s wider bundles can cost more or feel excessive when VPN, cloud storage and password management are not part of the requirement. |
Reviews
- Reddit discussion: A commenter described Proton Calendar as "Bare-bone" and criticized offline use and the lack of to-do features. The quote was verified against the source and represents one user's workflow, not a claim about encryption or current plan scope.
- Proton Calendar on the App Store: The listing confirms the iOS product identity and provides current release notes and user feedback. No aggregate is asserted because the page did not provide a dependable score for this exact app listing.
