Proton Calendar isn’t really ready for use feature-wise. It lacks at least proper iOS/Watch app and capture of .ics events from emails (basic use case of import

Proton Calendar isn’t really ready for use feature-wise. It lacks at least proper iOS/Watch app and capture of .ics events from emails (basic use case of importing appointment confirmation to the calendar). I would not consider Proton as a proper replacement of Google or Microsoft subscriptions for now, but looking at their open vacancies it may become a viable alternative in 2-3 years.