Lingofessor

Dual subtitles with AI explanations and spaced repetition on YouTube and Netflix.

Turn the shows and videos you already watch into your language course. Lingofessor adds dual subtitles to YouTube and Netflix, explains any word with one click — for the exact sentence you clicked, not a generic dictionary entry — and turns the words you save into spaced-repetition reviews scheduled by FSRS, the same science behind modern Anki. THE COMPREHENSIBLE-INPUT TOOLKIT • Dual subtitles: your target language + your language, right on the player • One-click explanations: meaning in context, register, pronunciation you can read • Click a word → save it, or mark it known • Known-word tracking: every video gets a % score of what you'll understand, so you always pick content at your level • Built-in reviews with fresh practice sentences — no export ritual, no Anki setup • Interactive transcripts with word-level seeking • Browse-page badges show which videos have real subtitles in your language — and how much of them you'll understand HONEST BY DESIGN • Auto-generated captions are labeled "auto" — machines mishear • If a video has no captions in your language, we say so instead of guessing • Flip the toggle off and YouTube/Netflix behave exactly as stock • No injected ads, no tracking, no video or audio capture — ever FREE FOREVER, PRO IF YOU'RE SERIOUS The free plan includes unlimited dual subtitles and transcripts, daily AI explanations, and a 30-word review deck. Pro removes the ceilings — or pay once with Pro Lifetime and keep it forever. Works with the YouTube and Netflix subscriptions you already have. Lingofessor never captures, records, or redistributes video or audio. A modern alternative to Language Reactor — actively built, actively supported.