What is the best organizing app with cross compatibility with Linux and Android?
Operating System: Android
I'm currently using Joplin for note taking and to-do lists, but the one thing that's killing me is the lack of a calendar or the support for exporting to one. What are your suggestions for an organizing app?
Some important features for me:
Sync - Must be supported between Android and Debian 10.
Privacy - Encryption, preferably something like Joplin where your items are encrypted and sent to the cloud storage service of your choosing for sync and backup. I really don't want to login to some online service, either.
FOSS would be preferred, but I would be open to a small one time fee if it checked all my boxes.
Calendar - Must be able to at least export / sync with another calendar app with similar sync and privacy features. Ideally, it would have an integrated calendar (Android widgets and Plasmoids are a plus too.)
Does anyone have any apps like this that work for them?