Your one-stop
publication workbench

From idea to publication in one app: Zettlr accompanies you while writing your blog post, newspaper article, term paper, thesis, or entire book.

I prefer using separate software for notes and to-do lists.
So, for to-do lists I use Joplin (on the Linux PC).
For long and knowledge base notes I use Zettlr (on the Linux PC) and for quick and encrypted notes I use Standard Notes on the Android Phone (it's available on F-droid).
https://www.zettlr.com
https://standardnotes.com
  

Standard Notes is a free, secure note-taking app with powerful end-to-end encryption, unparalleled privacy features, and seamless cross-platform syncing on unlimited devices.
Security without compromise.
Peace of mind with your newfound privacy comes easy with Standard Notes. But there's so much more.

Other apps force you into a rigid structure, making it difficult to truly capture and organize all of your thoughts, ideas, and creations. As a result, you find yourself relying on multiple tools to get the job done, leaving your data scattered and potentially vulnerable.
With Standard Notes, you have a single, all-in-one solution for securely storing and organizing your notes, files, and everything in between. Say goodbye to the hassle of using multiple apps and hello to pure, effortless productivity.

Joplin is an open source note-taking app. Capture your thoughts and securely access them from any device.

I love Joplin... and if you don´t know it jet you may try it out for your self.

Joplin is very extendible

There is a Appimage and a Flatpak for Linux which work very well

https://joplinapp.org/
https://joplinapp.org/help/install/
https://github.com/laurent22/joplin

and an apk for android:
https://f-droid.org/de/packages/net.cozic.joplin/

The notes can be securely synchronised using end-to-end encryption with various cloud services including Nextcloud, Dropbox, OneDrive , Joplin Cloud or the Hubzilla Cloud.

There is a joplin-web-clipper for Firefox
https://addons.mozilla.org/de/firefox/addon/joplin-web-clipper

and lost of other Plugins
https://discourse.joplinapp.org/t/plugin-list/17671