For another approach of keeping a todo-list in a .txt file one may also look at the syntax of todotxt. I use Todotxt.net on Windows for several years now with n

For another approach of keeping a todo-list in a .txt file one may also look at the syntax of todotxt. I use Todotxt.net on Windows for several years now with nextcloud sync and SwifttoDo on iOS and am quite happy with it.