Proton Calendar

Proton Calendar is ranked #6 of 197 in calendar apps on Freedom251, made by Proton Calendar (Plan-les-Ouates, Geneva, Switzerland). It runs on Android, iOS. There is a free plan.

Proton Calendar plans and pricing

All plans

Free Free billed monthly 3 calendars proton.me · 28 Sept 2026

Mail Plus Not published 25 calendars · 1 user proton.me · 20 Sept 2026

Unlimited Not published 25 calendars · 1 user proton.me · 20 Sept 2026

Paid Not published proton.me · 28 Sept 2026

Compared on calendar apps

Free plan: Yes
Shared calendars: Yes
Scheduling links: Yes
Calendar sync: one_way
Mobile apps: ios and android
Video meeting support: Yes

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Proton Calendar

Free account: Users can create a free account to use Proton Calendar.
Free calendar limit: The free plan allows up to 3 calendars.
Paid calendar limit: Paid Proton Mail plans allow up to 25 calendars.
Paid sharing: Paid users can share calendars with a link to other calendar services on the web.
Automatic renewal: Subscriptions purchased through proton.me renew automatically.
Plan switching: Users can switch plans at any time; upgrades receive prorated credit.
Event encryption: Events are protected with end-to-end or zero-knowledge encryption.
Encrypted details: Titles, descriptions, locations, and invited people are encrypted.
Swiss privacy: Proton is incorporated and headquartered in Switzerland and follows Swiss privacy laws.
Calendar sharing: Calendar sharing is included on paid plans and can use links to other services.
Appointment scheduling: Proton Calendar automatically updates availability and adds confirmed meetings.
Mail integration: Users can send invitations and add events directly from Proton Mail.
Import and export: Users can import calendars and export calendars on paid plans.
Event management: Users can create, edit, delete, and manage recurring events and invitations.
Price from: Free

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Where it ranks on Freedom251

Best Calendar Apps in 2026#6 of 197

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Sources

proton.me/calendar· checked 28 Sept 2026
proton.me/support/proton-calendar-guide· checked 28 Sept 2026
proton.me/pricing· checked 28 Sept 2026