ProtonMail recently launched ProtonCalendar (beta). Mobile apps are apparently in the works. Once it's out of beta and apps are officially available, that'll be one more Google service I can hopefully stop using.
@ink_slinger Interesting; that kindof kills any possibility of integration with third-party software if they don't, which seems like a weird omission since everything else under the sun seems to support CalDav. (My soon-to-be-laid-off-thanks-to-Kenney's-cuts officemate, for example, actually uses my Nextcloud instance to sync calendars between his desktop and his phone.)
@ink_slinger Heh, fair enough. Although . . . I personally wrote a from-scratch read-only iCalendar (ie. the format CalDAV uses) implementation to bridge our client database at work with folks' calendars in Thunderbird and Google Calendar and such in less than 100 lines of code, and I'm a pretty bad programmer, so although I know when scaling out things can get complicated, still, makes me more than a bit leery of ProtonMail that they can't accomplish this. NIH syndrome seems strong.