Lanma vs Language Reactor
Language Reactor is a browser extension that adds dual-language subtitles and a word saver to Netflix and YouTube while you watch on a computer. Lanma is a phone app for people learning English (and 19 other languages) from the YouTube videos they watch: the transcript becomes vocabulary you keep, then a live AI voice conversation gets you saying it. Here is where they differ, and who each one is better for.
Language Reactor and Lanma both start from the same idea: the video you were going to watch anyway is the best textbook. They part ways on where and when the learning happens.
Language Reactor lives in the browser and works while the video plays: dual subtitles, hover translations, a saved-word list. Lanma lives on your phone and works after the video: you share the link from the YouTube app, the transcript becomes a word set, and the words enter a review schedule you keep for months.
Side by side
| Lanma | Language Reactor | |
|---|---|---|
| Where it runs | iPhone and Android app | Desktop browser extension |
| When it works | After the video, from the share sheet or a pasted link | During the video, as an overlay |
| What it makes | A word set from the whole transcript, with meanings and example sentences | Dual subtitles and a list of words you clicked |
| Review | Spaced repetition, flashcards, cloze quizzes, six mastery levels | Saved-word review tools inside the extension |
| Speaking | Live AI voice conversation using your saved words, with a report card | None |
| Knows what you already know | Known words are folded away on later videos | Manual |
| Netflix | No | Yes |
| Ads | None on any plan | Free tier with a paid upgrade |
Who should pick which
Pick Language Reactor if you want watching with dual subtitles on a laptop and looking words up in the moment.
Pick Lanma if the words you want are in the videos you already watch, you want them to survive past next week, and you want to practise saying them out loud with someone who will correct you.
Questions people ask
Other comparisons: Lanma vs Anki · Lanma vs Duolingo
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