Question: Are there any free tools that can help me simplify complex documents and improve my comprehension?

If you're looking for free tools to make dense documents more understandable, Unriddle is another top pick. This AI system lets you read and research a document with an AI assistant built on top of the document itself. It can provide immediate answers, highlight text, create interactive graphs and let you take notes. And it can handle big PDFs, which is useful for researchers who need to quickly read and extract information.

Another good option is ChatPDF to help you understand PDFs, particularly research papers, academic papers and legal contracts. You can upload a PDF and ask questions and get answers and summaries. It can handle multi-file chats, add citations to the original documents, and work with documents in any language, so it's pretty flexible.

If you want to quickly summarize a long PDF, AI PDF Summarizer is another good option. It pulls out the most important information in a dense document so you can quickly understand it. The tool can summarize in any language and link to source documents, so it's good for academic research, business and medical research.

If you're focused on academic papers, Scholarcy is geared to boost research productivity. It converts dense documents into interactive summary flashcards and has tools for summarization, analysis and note-taking. Scholarcy is designed to help students and researchers quickly understand complex information so they can spend more time thinking at a higher level.