I tried that but it didn't have all the features I wanted. Specifically, I wanted to be able to make a list of subheadings as a flashcard (the front side being

I tried that but it didn't have all the features I wanted. Specifically, I wanted to be able to make a list of subheadings as a flashcard (the front side being the headlines above). There's a lot of information you can encode in just the hierarchy for free.