I keep falling into the occasional "I need a note-taking / todo app" rabbit hole, and there is a lot of people / companies re-inventing the wheel, but all of them nowadays seem Electron apps with proprietary cloud storage.

I should go back to a folder of .md files and todo.txt (http://todotxt.org/). Right now I'm using Evernote and Todoist but both of them ship my data off to the cloud - and I have no clue how secure it is. And sure I could do my due diligence but the companies are neither required to, and/or forbidden to reveal who has access to the data.