A: Thanks for the question!

At the moment, TidyCal only supports Google Calendar, Outlook/Office 365, and Apple/iCloud. Proton Calendar isn’t supported right now, and we don’t have plans for adding it yet.

That said, we are actively tracking requests for additional calendar providers, and Proton is one of the most commonly mentioned alternatives. If we add support in the future, it will be announced on our updates page and in the app.

If you’d like more details or have a specific workflow in mind, feel free to reach out to our support team anytime at support@tidycal.com