Calendar alternatives are worth considering when the incumbent gets expensive, restrictive, or invasive.
Proton Calendar is end-to-end encrypted on Proton’s servers and syncs with the Proton Mail app. It includes free and paid tiers and supports the standard ICS export for migration.
If you currently rely on Google Calendar and want more control over data, lower long-term costs, or a freemium licensing model, Proton Calendar covers most of the same ground.
Most freemium alternatives require more setup than their commercial counterparts and may lag on polish, mobile apps, or ecosystem integrations. Check the project’s documentation for current feature parity with Google Calendar before committing.
This recommendation is indexed from pixlrun-curated. Read their full project notes for the latest changes.