ReadGraph turns your books, documents, and the web into a knowledge base you can question, test, and build on. Ask your AI mentor anything — it searches your notes, uploaded files (PDF, Excel, images), and the web, then cites every source. Watch ideas compound in a 3D Knowledge Graph. Test yourself with spaced repetition assessments built from your own reading. 300+ AI models via OpenRouter. Hard budget controls. Everything runs on your machine. No cloud. No subscription. Yours forever.