Why InputDojo
Language Reactor (formerly Language Learning with Netflix) is the best free tool for watching Netflix and YouTube with dual subtitles and popup dictionaries — if you're on a desktop Chrome browser. InputDojo takes a different route to the same goal: import any YouTube video's transcript or any .srt/.vtt subtitle file, study it in a full reader with one-tap lookups, then review saved words with built-in SRS. You lose the live-inside-Netflix experience; you gain mobile, structured JLPT/HSK/CEFR study, and a review system that Language Reactor doesn't have.
Feature comparison
| Feature | InputDojo | Language Reactor |
|---|---|---|
| Watch Netflix with dual subtitles | No — import subtitle files instead | Yes, best-in-class |
| YouTube study | Import with auto-transcript, full reader | In-player dual subtitles |
| Works on mobile | Yes — PWA on any device | Desktop Chrome only |
| Built-in SRS review | Yes (SM-2) | No — export only |
| Exam tracks (JLPT/HSK/CEFR) | Free, full lists | Not available |
| Import articles, PDFs, ebooks | Yes | Text mode (limited) |
| AI grammar chat | Included on Ultimate | Not available |
| Price | Free tier + 14-day Pro trial | Free core, Pro ~$5/mo |
Based on publicly available Language Reactor feature documentation as of 2026. Compare directly before choosing.
Best for
Learners who love studying from video but want their lookups, saved words, and reviews in one system that works on their phone — not just in a desktop browser tab.
FAQ
Can InputDojo replace Language Reactor for Netflix?+
Not for live watching — Language Reactor's in-player Netflix experience is unique and worth keeping. InputDojo complements it: export or download subtitles as .srt/.vtt, import them, and study the vocabulary properly with SRS afterwards. Many learners use both.
How does YouTube study compare?+
Language Reactor overlays subtitles while you watch. InputDojo imports the full transcript into a reader, so you can work through it sentence by sentence, tap any word to save it in context, and review it later — better for study, less seamless for casual watching.
Does Language Reactor have spaced repetition?+
No — it saves words and phrases and can export them, but has no built-in review system. InputDojo reviews your saved words with SM-2 spaced repetition automatically.