Basically, yeah.

Although I use a notebook for most of my todos, anything more technical goes in a text file -- though I made mine like:

# todo.md
- todos for website.one [here](./website.one.md)
- todos for website.two [here](./website.two.md)

# website.one.md
- [x] support mobile views
- [ ] migrate to self-hosted

Although my "todos" double as "ideas to try out" and "projects to spike" so I like this type of organization.

Actually speaking of pointless todo apps... I have this one I've been mulling over that basically takes a markdown list as input, does logical stuff to it, then outputs in the same format. I don't know if that's useful in any way, but I feel every nerd needs to reinvent the wheel at least once.