Import your textbook PDF, take a placement test and work through it chapter by chapter, offline.

Features

• Placement test — 30 Cambridge-style questions, A1 to C2, scored to a starting level
• PDF textbook import — parses the structure of Murphy's English Grammar in Use into units
• Auto-built curriculum — chapters unlock as you progress
• Grammar explanations and exercises — 80 static exercises for units 1–20 out of the box
• Progress tracking with adaptive difficulty
• Light and dark themes
• Works offline; AI-generated explanations are optional and need your own LLM API key

Stack

Electron · React · TypeScript · SQLite (better-sqlite3) · pdf.js · Tailwind CSS · Vite

src/main/       Electron main process: IPC handlers, PDF parser, database services
src/renderer/   React UI: onboarding, placement test, dashboard, chapters, exercises, progress
src/shared/     types shared by both sides
docs/           architecture, feature specs, design system, roadmap

Development

npm install
npm run dev            # start the dev servers
npm run electron:dev   # launch Electron

Build

npm run package:mac    # → release/*.dmg
npm run package:win    # → release/*.exe

Docs

Architecture · Placement test · PDF import · Curriculum · Design system · Roadmap