Edit: I seek a server-less solution.
The only thing I can see is Linwood Flow but it looks like it’s a really, really long way off before becoming a primary calendar app.
If it could just store all calendar content in 1 local file, then that could be so easily auto-synced across devices with !syncthing@programming.dev. Does anyone have any leads?
Hmm, I just now learned about Fruux, in this Reddit post…
I do have that, haha, yeah. There appears to not be.
That’s an old post. They adopted a different email client on the Android K9 and rebranded it as Thunderbird: https://k9mail.app/ and https://www.thunderbird.net/en-US/mobile/ But after some searching I couldn’t find anything. So maybe it still does not on Android.