Get It study app bundles OpenAI Codex CLI for local PDF AI

Get It is a desktop study app born from a hackathon by Mattia and his team at Politecnico di Milano. It takes a dense PDF and turns it into an interactive visual study path: the original document stays centered while the app detects concepts needing explanation and generates diagrams, 3D scenes, animations, charts, and formulas right next to the page. Additional features include chat, flashcards, quizzes, and a Feynman-style mode backed by a concept graph. The app is open-source under Apache-2.0, and its code is available on GitHub.

What makes the project stand out is its AI architecture: instead of using their own API key or a metering layer, the team bundled OpenAI's Codex CLI directly into the desktop app. Users simply sign in with their personal ChatGPT account, and the app uses that local Codex session for all generation. This means no extra AI subscription for students, no API keys sent to the developers, no markup on model usage, and study material stays entirely on disk. The free ChatGPT tier works for lighter PDFs, while a Plus or higher subscription is recommended for larger files. It's still early-stage and hackathon-born, but the app is fully functional and available now.