Get It

Most study apps assume the problem is content: you don't have enough summaries, enough flashcards, enough explanations. Get It assumes the problem is proof. Students already own the PDF. What they lack is a way to see the parts their textbook refuses to draw, and a way to demonstrate to themselves that they actually understood a concept rather than merely recognized it on the page. That thesis shows up in every design decision. The visualizer does not summarize the chapter; it tags the concepts that benefit from a picture and renders up to four of them in parallel next to the live text — Three.js scenes for methane's tetrahedral geometry or an anatomical organ, canvas animations for projectile motion and projectile-motion-adjacent chemistry, clean formulas, plotted graphs, and cited sources from the literature. The knowledge graph does not reward effort; it scores each concept across Memory, Comprehension, Structure, and Application, 0–100, and clamps the numbers so they can never go down. Whether that monotone clamp is a pedagogical feature or a comfort blanket is the honest open question — it does prevent the discouraging regression that plagues spaced-repetition dashboards, but it also hides decay that real forgetting curves would show. The four tools — document-scoped multi-thread chat, AI-generated flashcards with Again/Hard/Good/Easy self-grading, forced-choice quizzes with three plausible distractors, and Feynman mode against a curious-eight-year-old agent — all write to a single interaction journal. A dedicated evaluator agent then reads that journal end-to-end and updates the four scores. Four tools, one journal, one evaluator is the actual architectural idea here, and it is more interesting than any individual feature. Where it fits: STEM self-learners in chemistry, physics, and biology who read long-form PDFs and already hold a ChatGPT subscription, and open-source users comfortable running an Apache 2.0 desktop app. Where it does not: literature or history majors, whose PDFs the domain visualizers serve poorly; anyone who needs to study on a phone or in a browser; and anyone who wants a zero-install flashcard tool. Desktop-only is a real constraint, not a footnote.