It's a desktop app that turns any YouTube video into an interactive language lesson:
-Paste a URL → AI generates bilingual subtitles (Whisper)
-Click any word → instant translation + pronunciation
-Select a sentence → Gemini explains grammar in context
-Chat with an AI tutor who knows your video's content
-Save vocabulary → spaced repetition review
Tech stack: Electron + React + FastAPI + Whisper + Gemini(BYOL is supported)
100% local-first. Your data stays on your machine. You can use your own API key.
Free tier: 500 credits/month (enough for 2-3 full video sessions).
Windows only for now, macOS coming soon.
Landing page: https://linguamaster.top
Would love feedback, especially on the UX and what languages/features you'd want.