Show HN: Explainr – Upload a research paper and get a learning roadmap

I built Explainr (https://explainr.aryanbuilds.com) to help people understand research papers. You upload a PDF, and it extracts key topics, their prerequisites, and gives you a learning roadmap.

I’d love feedback on: Usefulness of the roadmap Accuracy of topic extraction Any UI/UX issues

Note: You get 20 free credits (1 credit per document). Billing isn’t fully functional yet, and the API might throttle under load. But it works reliably for individual use.

I'm at a point where I might move away from the project, but I wanted to ship it and learn what could be improved. Appreciate any feedback!