Language Reactor Alternatives: Free, Mobile & Firefox (2026)

If you want a Language Reactor alternative that also works on Prime Video, Disney+, and HBO Max and comes with iOS and Android apps, Lingosive is built for that. As of October 2026, Language Reactor's extension works on Netflix and YouTube only, its FAQ says Disney+, Amazon Prime, and Android aren't supported, and we found no app from its maker to install on your phone. It's still an excellent tool, so here's an honest look at what each one does better.

We make Lingosive. Every Language Reactor detail below comes from its own website, help pages, forum, and Chrome Web Store listing, checked in October 2026.

Language Reactor Alternatives at a Glance

As of October 2026, from each product's own site, help pages or store listings:

Tool	Works on	Apps	Browsers	Free plan
Language Reactor	Netflix, YouTube	None from its maker; the website works in a phone browser	Chrome on desktop	Yes; optional Pro
Lingosive	Netflix, YouTube, Prime Video, Disney+, HBO Max	iOS and Android	Chrome, Edge, Brave and other Chromium browsers	Yes; Premium removes its limits
Trancy	YouTube, Netflix, Disney+, HBO Max, TED, Udemy, Coursera, edX	iOS and Android	Chrome, Edge, Firefox, Brave, Arc, Safari	Yes; AI features need Premium
Migaku	Netflix, YouTube, Disney+, Rakuten Viki, Animelon	iOS and Android	Chrome	No; 10-day money-back guarantee
Lingopie	Its own catalog of TV shows and movies	iOS, Android and TV apps	Chrome (its extension)	Not on its website; 7-day free trial

Lingosive is the closest match if you like how Language Reactor works, with dual subtitles on the streaming sites you already use, and want it on more platforms and on your phone. Trancy reaches the most sites and browsers (Firefox included), Migaku is built around flashcards, and Lingopie replaces your streaming service with a catalog of its own. Each one is covered below.

On Android or iPhone?

As of October 2026, we found no Language Reactor app from its maker for Android, iPhone, or iPad. Its website opens in a phone browser and can be added to your home screen, but its Netflix tools need the desktop Chrome extension. Lingosive has a native iOS and Android app that offers YouTube videos with dual subtitles, tap-to-translate, a book reader, and flashcards. Neither one works inside the Netflix app on a phone. For the full answer, with sources, see Language Reactor on Android and iPhone.

What Language Reactor Does Well

Language Reactor, which began as Language Learning with Netflix, helped popularize learning with dual subtitles, and its homepage now counts more than 2,000,000 users. Today it's much more than a subtitle overlay:

Bilingual subtitles on Netflix and YouTube, with auto-pause and keyboard shortcuts for replaying lines.
A click-to-look-up dictionary with Lexa AI explanations of how a word is used in context.
Highlighting that tracks the words you know and the ones you're learning.
PhrasePump, a listening exercise built around saved words that are due for review, plus Anki and CSV export.
Aria, an AI chat partner, and structured FSI/DLI speaking drills.
A catalog of YouTube channels, Netflix titles, podcasts, and books on its website, with videos and books filterable by difficulty.

On Netflix, the free plan shows the subtitle tracks Netflix provides, so you get human translations whenever a show has a track in your language.

Where It Falls Short

Two platforms. The extension adds its tools to the Netflix and YouTube websites only. Its FAQ lists Disney+ and Amazon Prime as unsupported, and HBO Max isn't among its supported sites either.

No phone app. We found no Language Reactor app for iOS or Android from its maker, Dioco. Its homepage says it also works on phones and tablets, and its team suggests using the website in a mobile browser, but the extension that powers Netflix and YouTube runs only in Chrome on Windows and macOS computers.

Key features sit behind Pro. On the free plan, you can save words only while using PhrasePump. Saving words across Netflix, YouTube, and the rest of Language Reactor, machine translation on Netflix (which you need when a show has no subtitle track in your language), and the enhanced AI model are all Pro features. Pro comes as a 1-month, 3-month or 1-year subscription, priced in your local currency; our Language Reactor pricing guide lists the prices we checked and what Pro adds over the free mode.

If you watch an episode a week on Netflix, none of this matters much. If you watch across several services or want to review on your phone, it adds up.

How Lingosive Is Different

Five platforms. Lingosive works on Netflix and YouTube and also on Prime Video, Disney+, and HBO Max. It uses the subtitle track you pick in the player, and the second line is a machine translation of each line into your language, so you get two languages even when a show has no subtitle track in yours. That translation line is part of the free plan.

Word help in context. Hover over a word for a quick translation, or click it for an AI explanation of what it means in that sentence, with a grammar note where it helps and a few synonyms. Once you sign in, subtitle words are color-coded as known, learning, or above your level.

Apps that sync. Saved words go to the iOS and Android apps and the web learning center, where spaced-repetition flashcards bring them back for review. The apps also have their own library of 400,000+ YouTube videos and podcasts with dual subtitles and a book reader with 15,000+ books, so you can keep studying without a streaming subscription.

Word in Film. Word in Film lets you type a word or short phrase and watch real movie and TV scenes where it's said, drawn from 50 million+ video contexts in English, Spanish, French, German, and Japanese. It's free with a Lingosive account, with a daily search limit on the free plan.

How the Two Compare

	Lingosive	Language Reactor
Netflix	✓	✓
YouTube	✓	✓
Prime Video	✓	✗
Disney+	✓	✗
HBO Max	✓	✗
Second subtitle line on Netflix	Machine translation of each line, on the free plan	Netflix's own tracks on the free plan; machine translation with Pro
AI word explanations	✓ (daily limit on the free plan)	✓ Lexa AI (basic on the free plan, enhanced with Pro)
Saving words on the free plan	✓ (up to a cap)	Only inside PhrasePump
Review	Spaced-repetition flashcards in the apps and on the web	PhrasePump and flashcards on its website
Anki export	✗	✓
iOS and Android apps	✓	✗ (the website works in a mobile browser)
Video and book library	400,000+ YouTube videos and podcasts (apps and web), 15,000+ books (apps)	Catalog of YouTube videos, Netflix titles, podcasts, and books
Learning languages	13	40+
Browsers	Chrome, Edge, Brave	Chrome on desktop

Language Reactor details come from its homepage, Pro page, help pages, FAQ, forum, and Chrome Web Store listing, checked in October 2026. Lingosive's 13 counts Simplified and Traditional Chinese separately, and its flashcard practice doesn't cover all 13 yet.

When Language Reactor Still Makes Sense

If you only watch Netflix and YouTube and study at a computer, Language Reactor's free plan is hard to argue with. It's also the better pick if you prefer Netflix's own human translations to machine translation, if you review in Anki, if PhrasePump, the Aria chat partner, or the FSI/DLI drills appeal to you, or if your target language isn't one of Lingosive's 13.

If you want your vocabulary on your phone, a library that doesn't depend on a streaming subscription, and dual subtitles on Prime Video, Disney+, and HBO Max, Lingosive is the more complete fit.

Getting Started with Lingosive

Install the extension from the download page. It works in Chrome, Edge, Brave, and other Chromium browsers.
Choose your own language and the one you're learning, then sign in.
Open a show and turn on subtitles in the language you're learning. Lingosive makes them clickable.
Click the double subtitle button beside the subtitles, or press N, to add a translation line.
Get the iOS or Android app to review your saved words away from your desk.

There's nothing else to import or configure.

Other Alternatives Worth Knowing

Migaku: a paid, flashcard-first tool (no free plan; its pricing page lists a 10-day money-back guarantee) with its own spaced-repetition system and optional Anki export. Its extension supports Netflix, YouTube, Disney+, Rakuten Viki, and Animelon, and it has extra tools for Japanese and Mandarin.

Trancy: a free plan plus Premium, an extension for Chrome, Edge, Firefox, and Safari, and iOS and Android apps. Its manual lists YouTube, Netflix, Disney+, HBO Max, and TED, plus course sites like Udemy and Coursera.

Lingopie: a learning service built around its own catalog of TV shows and movies with clickable subtitles, with apps for iOS, Android and TVs. A Chrome extension with dual subtitles and vocabulary tools comes with the membership. There's a 7-day free trial, but no free plan on its website.

We compare Lingosive, Language Reactor, Migaku, and Trancy side by side in our roundup of dual subtitles Chrome extensions. For a feature-by-feature table with a source for every row, see Lingosive vs Language Reactor.

Frequently Asked Questions

Does Language Reactor have a mobile app?

Not as of October 2026. Its FAQ says Android isn't supported yet, and we found no iOS or Android app from its maker; you can use its website in a mobile browser instead. Lingosive has iOS and Android apps that sync with the browser extension.

Does Language Reactor work on Disney+, Prime Video, or HBO Max?

Not as of October 2026. Its help pages say the extension adds tools to the Netflix and YouTube websites, and its FAQ says Disney+ and Amazon Prime aren't supported yet. Lingosive adds dual subtitles on Prime Video, Disney+, and HBO Max as well as Netflix and YouTube. For a platform-by-platform check with sources, see Language Reactor on Disney+, Prime Video, and HBO Max.

Does Lingosive work without a Netflix subscription?

Yes. The iOS and Android apps and the web learning center have their own library of 400,000+ YouTube videos and podcasts, and the apps add a reader with 15,000+ books, so you can study without any streaming subscription. The free plan limits daily video practice in the app and offers book samples; Premium removes the video limit and unlocks the full book library.

How many languages does Lingosive support?

In the extension, you can choose from 13 learning languages: English, Spanish, French, German, Italian, Portuguese, Turkish, Russian, Japanese, Korean, Hindi, and Chinese (Simplified and Traditional), and the interface is available in the same 13. The app's video library covers eight of them (English, Spanish, French, German, Italian, Portuguese, Russian, and Japanese), flashcard practice doesn't cover all 13 yet, and Word in Film has scenes in English, Spanish, French, German, and Japanese. Your own language, which the translation line and word meanings use, can be any of 68 languages in the extension.

Is there a free Language Reactor alternative?

Yes. Lingosive and Trancy both have free plans. On Lingosive's, dual subtitles and word translation are free on all five platforms, with a daily allowance of AI explanations and Word in Film searches plus a capped number of saved words; Premium removes those limits and unlocks the full book library. Trancy's free plan includes bilingual subtitles, while its AI features need Premium. Migaku has no free plan, and Lingopie's website offers a 7-day free trial rather than a free plan. Language Reactor itself is free too; there, saving words outside PhrasePump and machine translation on Netflix require Pro.

Is there a Language Reactor alternative for Firefox?

Of the tools compared here, only Trancy lists a Firefox version. Lingosive runs in Chrome, Edge, Brave, and other Chromium browsers, and Migaku's and Lingopie's extensions are for Chrome.