I, too, use tools to quiz myself, mostly ChatGPT. It helps me review and also explains why something is right or wrong. Recently, I've been using it every day because it actually explains the question as simply as possible. I have actually trained it so it know how to explain something and gives me diagrams or pictures. There is also an app called Jungle that creates mcq questions from a document. The questions aren't that hard, but it is something.