What it does

Get It. is a desktop study app that ingests text-based PDFs and layers on concept tags, visualizations, flashcards, quizzes, chat, and a Feynman-technique tutor. Everything runs locally against your own ChatGPT or OpenAI API key—no vendor subscription, no backend, no data leaves your disk.

The interesting bit

The app treats studying as measurement, not activity. After each session an evaluator agent scores every concept node across four axes—memory, comprehension, structure, application—on a 0–100 scale that is clamped monotone non-decreasing. You can only improve or stay flat; the app refuses to let a bad day erase progress. That design choice turns a study tool into something closer to a calibrated instrument.

Key highlights

• Bring-your-own-LLM: Authenticates through official Codex CLI; runs on your existing ChatGPT tier (Plus recommended, free tier intentionally thin)
• Self-healing visualizations: Tags auto-render as 3D scenes, animations, formulas, or graphs; if a sandbox crashes, the agent reads its own error and re-emits a fix
• Knowledge graph with teeth: 6–25 concept nodes, sized by mastery, colored by progress, backed by a four-axis rubric
• Desktop-native, offline-first: Electron-wrapped Next.js app; all data lives in OS-native storage, exportable as a single JSON file
• Signed and notarized macOS builds; Windows builds currently unsigned (SmartScreen warning expected)

Caveats

• Rejects scanned/image PDFs outright; needs text-based documents
• Windows builds lack code-signing; macOS Sequoia 15+ removed the old right-click-open bypass for unsigned builds
• Browser dev mode (npm run browser:dev) is the smoother inner loop; the Electron HMR path has a known Next 16.2.6 + Turbopack hydration glitch

Verdict

Worth a look if you treat studying as a skill to instrument rather than a chore to gamify. Skip it if you need mobile, collaborative features, or a polished Windows installer experience today.