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Proton Calendar helps you stay on top of your schedule while protecting your data. Apps available for Android, iOS, and the web.

Private calendar: Reminders, schedule planner, calendar widget, time-management

Set up a private business email and calendar that keeps your company's communications compliant, secure, and productive. Download Proton Mail for Business...

Download the Proton Calendar app to keep the events of your life private.

Healthcare businesses use our encrypted products to keep their business emails, calendar, files, and online activity secure, private, and HIPAA compliant.

Keep your schedule private in a secure calendar app, because your life is your business. Get Proton Calendar, the world's largest encrypted calendar service.

Proton offers encrypted email, file storage, and calendar through our Tor onion site, allowing anonymous connection to Proton.

Jan 4, 2026 - O Proton Calendar é uma agenda digital gratuita que prioriza sua privacidade com criptografia de ponta a ponta. Simples, funcional e sem anúncios, protege...