Google Calendar is a time-management and scheduling calendar service developed by Google. It allows users to create and edit events, set reminders,...
Best ProtonCalendar Alternatives ranked by AI · updated May 2025
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ProtonCalendar is a secure and privacy-focused calendar application developed by ProtonMail, offering end-to-end encryption and a user-friendly interface.
Price: Free with ProtonMail account or ProtonCalendar Plus for $4/month
🎯 protonmail.com/calendar
Top 6 ProtonCalendar alternatives
Microsoft Outlook Calendar is a calendar tool integrated with the Outlook email and productivity suite. It allows users to schedule appointments, meetings,...
Included in Microsoft 365 subscription
Apple Calendar is a calendar application for iPhone, iPad, Mac, and iCloud users. It supports recurring birthday events, alerts, contact integration, invitations,...
Pros
- Built into Apple devices and tightly integrated with Contacts
- Provides dependable recurring alerts without another dedicated app
- Offers stronger event and invitation support than Billy Birthday
Cons
- Best experience is limited to users in the Apple ecosystem
- Less specialized for birthday lists and gift-related notes
- Sharing and collaboration are less flexible than Google Calendar in mixed-device groups
Tutanota is an open-source end-to-end encrypted email software and freemium hosted secure email service.
Freemium
Simple Calendar is a user-friendly calendar app for organizing your events and tasks.
Free with premium options
Business Calendar is a popular calendar app for Android with various features designed for business users.
Free with in-app purchases
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