Language Reactor
Immersion (video, reading): two sets of subtitles, a pop-up dictionary and playback tools for Netflix and YouTube in your browser.
Prices checked 13 Oct 2026 · How we check
Is Language Reactor worth it?
Yes, if you already watch Netflix or YouTube in the language and want to understand more of it.
What it costs. A year costs $39.95 ($3.33 a month); month to month is $5.95.
What's free. The extension and website are free: dual subtitles (Netflix's own), pop-up dictionary, playback controls, YouTube and podcast catalogue, basic AI helper and chat with Aria.
Skip it if you want to study on a phone or tablet: the extension runs in Chrome on a Windows or Mac computer.
$39.95 a year $3.33 a month, billed yearly · Language Reactor Pro, 1 year
In our comparison: strongest on price and the free tier, weakest on teaching depth.
- Annual plan
- $39.95 a year ($3.33/mo)
- Monthly plan
- $5.95
- Lifetime plan
- —
- Free tier
- Free to keep using
The extension and website are free: dual subtitles (Netflix's own), pop-up dictionary, playback controls, YouTube and podcast catalogue, basic AI helper and chat with Aria; saving words is limited to PhrasePump. Pro adds machine translation, speech recognition on Netflix and saving everywhere. - Languages
- 51
- Speech recognition
- Yes · You can speak to the Aria chat; Pro's 'speech recognition' also makes subtitles from Netflix audio. No pronunciation scoring is described.
- Live tutoring
- —
- Offline mode
- —
- Placement test
- —
- CEFR levels
- —
- Refund or trial
- A Pro free trial ends by returning you to free mode, with no charge; Pro is an auto-renewing subscription you can cancel after paying. No refund policy is published.
- Platforms
- Web
As an Amazon Associate I earn from qualifying purchases. Links to the app makers' own sites earn us nothing. Commissions never affect which apps we recommend. Affiliate disclosure and how the data is collected.
How a Language Reactor lesson works
- What you do
- Watch a Netflix or YouTube video with subtitles in both languages: hover over a word for its meaning, replay a line, save words to review.
- What comes back
- Automatic: exercises are marked, and speech recognition scores how you say words. No person checks your work.
- Not included
- A live teacher or stated CEFR levels.
How a lesson works in an immersion app
Plans and prices
Every consumer plan on Language Reactor's own pricing page or app-store listing, in US dollars unless marked. Per month is the plan price divided by its term. Where the seller shows a crossed-out price beside the one it charges, the figure is the one it charges, and the plan's note gives the crossed-out price.
| Plan | Billing | Price | Per month | Covers |
|---|---|---|---|---|
| Language Reactor Pro, 1 yearProPro: speech recognition and machine translations on Netflix, saving words and phrases in every feature, the stronger Lexa AI dictionary and Aria's chat memory. US price from the Paddle checkout price feed that the pro-mode page loads (customer_country=US); our server is outside the US and the page itself showed euros (€5.42 / €12.72 / €36.42). | Annual | $39.95 | $3.33/mo | all languages |
| Language Reactor Pro, 3 monthsProPro: speech recognition and machine translations on Netflix, saving words and phrases in every feature, the stronger Lexa AI dictionary and Aria's chat memory. US price from the Paddle checkout price feed that the pro-mode page loads (customer_country=US); our server is outside the US and the page itself showed euros (€5.42 / €12.72 / €36.42). | Every 3 months | $13.95 | $4.65/mo | all languages |
| Language Reactor Pro, 1 monthProPro: speech recognition and machine translations on Netflix, saving words and phrases in every feature, the stronger Lexa AI dictionary and Aria's chat memory. US price from the Paddle checkout price feed that the pro-mode page loads (customer_country=US); our server is outside the US and the page itself showed euros (€5.42 / €12.72 / €36.42). | Monthly | $5.95 | $5.95/mo | all languages |
| FreeDual subtitles, dictionary and playback tools on Netflix and YouTube using Netflix's own subtitles; word saving only in PhrasePump; basic AI helper; chat with Aria. | Other | $0 | — | all languages |
What will Language Reactor cost you?
Total billed over 12 months
$31.45 less on annual billingOne yearly payment of $39.95.
What each plan covers. Monthly: all languages. Yearly: all languages.
Before subscribing, compare trial, cancellation and refund terms, including how purchases through an app store differ.
What Language Reactor says about itself
| Feature | What Language Reactor says |
|---|---|
| CEFR levels | — |
| What it is | Immersion (video, reading). A toolbox to discover, understand and learn from native materials: a browser extension that adds dual-language subtitles, a pop-up dictionary and precise playback controls to Netflix and YouTube, plus a website for books, webpages, PhrasePump listening drills and an AI chat partner. |
| Languages offered | 51: Afrikaans, Arabic, Basque, Belarusian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Korean, Latin, Latvian, Lithuanian, Malay, Maltese, Marathi, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese |
| Free tier | The extension and website are free: dual subtitles (Netflix's own), pop-up dictionary, playback controls, YouTube and podcast catalogue, basic AI helper and chat with Aria; saving words is limited to PhrasePump. Pro adds machine translation, speech recognition on Netflix and saving everywhere. |
| Platforms | Web |
| Offline mode | — |
| Speech recognition | Yes · You can speak to the Aria chat; Pro's 'speech recognition' also makes subtitles from Netflix audio. No pronunciation scoring is described. |
| Live tutoring | — |
| Placement test | — |
| Refund or trial | A Pro free trial ends by returning you to free mode, with no charge; Pro is an auto-renewing subscription you can cancel after paying. No refund policy is published. |
| Company | Dioco |
How Language Reactor compares
Language Reactor is strongest on price and the free tier, weakest on teaching depth. Each criterion is scored out of 5 from what each app says about itself and from independent reviews, to compare apps that do the same job; it is not a review of the app. How we score.
| Feature | Score (of 5) | Why |
|---|---|---|
| Teaching depth | 2 | Two sets of subtitles, a pop-up dictionary and playback tools for Netflix and YouTube in your browser |
| Speaking practice | 3 | Speech recognition scores your pronunciation |
| Language coverage | 5 | 51 languages |
| Free tier | 5 | The whole product is free, with ads or limits |
| Price per month | 5 | $39.95 a year $3.33 a month, billed yearly · Language Reactor Pro, 1 year |
| Trial and refund | 2 | A Pro free trial ends by returning you to free mode, with no charge; Pro is an auto-renewing subscription you can cancel after paying. No refund policy is published |
| Offline use | – | — |
| Staying power and bugs | – | Not available |
Languages you can learn on Language Reactor
51 languages as listed by Language Reactor.
Afrikaans, Arabic, Basque, Belarusian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Filipino, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Irish, Italian, Japanese, Korean, Latin, Latvian, Lithuanian, Malay, Maltese, Marathi, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese
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References
- Language Reactor's checkout (Paddle): US prices (checked 13 Oct 2026)
- Language Reactor: home page (checked 13 Oct 2026)
- Language Reactor: Pro (checked 13 Oct 2026)
- Chrome Web Store: Language Reactor
- Language Reactor: updates
- Language Reactor: FAQ (checked 13 Oct 2026)