I believe I shared this once before. After twenty years of trying every possible note taking app from Word 95 to Notion, this is now the entirety of my note taking app:
I usually use a paper notebook when I'm away from my computer. But if I really want to take a digital note, I can do so. Notice that the text file is synced to Dropbox. I can open it using the Dropbox mobile app, scroll to the bottom and add a manual entry. But obviously, it's not as fast as a command line entry.
I’ve set-up an iPhone’s Shortcuts workflow which basically replicates the shell script above. Works very well. Reading on mobile is a bit painful, but doable, and I mostly do it at a computer anyway.