"Chat with PDF" software is garbage, since you don't actually read the logical flow of content. So I built a reading assistant, where you can simplify complex portions of text as you read through them, with citations. I've been using this to read ML papers.
Highlight any text on arXiv (or any webpage) and generate concise, accurate explanations with sources. Rabbit-hole through related links or chat with the best ai models from OpenAI/Perplexity right from the sidebar, while maintaining context.