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Linux user here. I don’t know of an open desktop calendar app that supports the protocol I need (CalDAV) without being one or more of:
- Bloated
- Too simplistic to be useful
- Too annoying to use (poor UI)
The best compromise I’ve found so far is Thunderbird. It is bloated, but less so than any Electron app I’ve used. I find the UI annoying, but tolerable for lack of a better option. I’m thankful for an open, cross-platform tool that gets the job done, but I wish I had one that was lightweight and pleasant to use.
It would be nice to see some new work in this area. It’s a similar situation with email apps.
Or the well-maintained and developed derivative:
https://shatteredpixel.com/
https://f-droid.org/en/packages/com.shatteredpixel.shatteredpixeldungeon/