Thank you, I just created an account with Plane, looks great!

Filen checks off most of your requirements https://filen.io/

• Auto-sync between my Android phone and Linux desktop
• Journaling
• Quick notes
• To-do lists
• Planning
• Writing down thoughts
• A really good Andoid app
• Easy to use
• Free for personal use

Filen is missing project management stuff like Kanban etc, just use cryptpad for that. Cryptpad https://cryptpad.fr/

Edit: Another comment mentioned Plane, I’d recommend it over Cryptpad. Cryptpad is really barebones in comparison even though they’re growing and adding features and integrations.

My recommendation is now Filen + Plane https://plane.so/