CJI switched to Jopin for my cross platform note taker a while ago. One thing I discovered today is that I can use check boxes in it. I add a checkbox to the markup either by clicking on the checkbox button or typing "- [ ]" in the markup. I can then check the box by clicking on it in the rendered page. This will be great for keeping track of to do lists!
BTW, I found this by asking Perplexity.