If you learn languages by watching movies and TV shows, you have probably come across Language Reactor and Trancy. Both are popular Chrome extensions that add dual subtitles, vocabulary tools, and translation features to streaming platforms. But which one actually deserves a spot in your browser? We put them head to head across pricing, platform support, features, ease of use, and language coverage to help you decide.
If you want a broader overview of all the tools available, check out our guide to the best dual subtitle extensions or our deep dive into Netflix language learning extensions.
Quick Overview
Language Reactor (formerly Language Learning with Netflix) has been around since 2019 and built a loyal user base with its clean interface and catalogue mode. Trancy launched in 2023 and has quickly gained traction with its AI-powered grammar breakdowns and wider platform support. Both tools aim to turn passive watching into active learning, but they take different approaches to get there.
Language Reactor
Est. 2019 · 1M+ users
- $6/mo (Pro)
- Netflix, YouTube
- 40+ languages
Trancy
Est. 2023 · 500K+ users
- $8/mo (Pro)
- Netflix, YouTube, Disney+, more
- 30+ languages
Pricing Comparison
Cost is often the deciding factor for language learners, especially those just starting out. Here is how the two extensions compare on price.
Language Reactor Pricing
Language Reactor offers a free tier with basic dual subtitles on Netflix and YouTube. The Pro plan costs $6 per month (or $48/year) and unlocks machine translations, phonetic transcriptions (romaji, pinyin), vocabulary export to Anki, and the catalogue mode for finding content by difficulty level. The free tier is surprisingly usable, but the vocabulary features are locked behind the paywall.
Trancy Pricing
Trancy also has a free tier, but it is more restrictive — you get limited daily AI queries and basic subtitle display. The Pro plan is $8 per month (or $60/year) and unlocks unlimited AI grammar analysis, sentence-by-sentence replay mode, full platform support, and advanced vocabulary tools. While it costs more, the AI grammar feature is genuinely unique.
For learners on a budget, Language Reactor's free tier offers more functionality. But if AI grammar breakdowns are important to you, Trancy's $8/mo may be worth the premium.
Feature-by-Feature Comparison
Below is a detailed breakdown of how Language Reactor and Trancy stack up across the features that matter most for language learners.
Platform Support
One of the biggest practical differences between these two tools is which streaming services they support.
Language Reactor focuses on Netflix and YouTube. That is it. If you primarily watch content on these two platforms, this is perfectly fine. But if you use Disney+, HBO Max, or Prime Video, you are out of luck.
Trancy supports a wider range of platforms including Netflix, YouTube, Disney+, Coursera, TED, and several other video sites. This makes it more versatile if your content diet spans multiple services. However, neither tool supports Amazon Prime Video at the time of writing.
Neither extension works on mobile devices or smart TVs — they are both Chrome-only desktop extensions.
Ease of Use
Language Reactor has a mature, well-polished interface. When you open Netflix or YouTube, the extension automatically activates and displays dual subtitles below the video. The sidebar catalogue mode lets you browse content and filter by language and difficulty. The learning curve is gentle — most users figure it out within a few minutes.
Trancy has a slightly busier interface with more options visible at once. The AI grammar panel opens alongside the subtitles, which can feel overwhelming at first. However, once you get used to the layout, it becomes intuitive. Trancy also includes an onboarding tutorial that walks new users through each feature.
Both extensions install in under a minute from the Chrome Web Store and require no complex setup.
Language Support
Language Reactor supports over 40 languages, making it one of the most comprehensive options available. This includes popular choices like Spanish, French, German, Japanese, Korean, and Chinese, as well as less commonly studied languages like Turkish, Thai, and Vietnamese.
Trancy supports around 30 languages. While this covers all the most popular choices, learners of less common languages may find gaps. Trancy's AI grammar feature works best with major languages like English, Spanish, Japanese, and Korean — the quality of grammar explanations can vary for smaller languages.
Pros and Cons
Language Reactor
Pros
- Generous free tier
- Clean, mature interface
- Anki export for spaced repetition
- Catalogue mode with difficulty ratings
- 40+ languages supported
Cons
- No AI grammar analysis
- Limited to Netflix and YouTube
- No pronunciation audio
- Vocabulary export requires Pro
Trancy
Pros
- AI-powered grammar breakdowns
- Wider platform support (Disney+, TED)
- Pronunciation audio included
- Web page translation mode
- Sentence-by-sentence replay
Cons
- Higher price at $8/month
- Restrictive free tier
- No Anki export
- Busier interface at first
- Fewer supported languages
Our Verdict
Choose Language Reactor if: You primarily use Netflix and YouTube, want a clean interface, prefer Anki integration for spaced repetition, and want a usable free tier. At $6/mo for Pro, it is also the cheaper option.
Choose Trancy if: You want AI grammar analysis, use streaming platforms beyond Netflix and YouTube (especially Disney+), and value pronunciation audio and web page translation. The $8/mo price tag is justified if you actively use these features.
But honestly? Both tools lock important features behind paid plans. If you are looking for a comprehensive language learning extension that does not cost anything, there is a third option worth considering.
The Free Alternative: FunLingo
FunLingo offers everything you need for language learning through video — completely free. Unlike Language Reactor and Trancy, you do not need to choose between a limited free tier and a monthly subscription.
- Dual subtitles on Netflix, YouTube, and Prime Video
- Word-level translation popups with multiple meaning options
- Pronunciation audio with slow playback mode
- AI-powered contextual grammar explanations
- Built-in vocabulary saver for review
- No account required, no hidden paywalls
FunLingo covers all three major streaming platforms — including Prime Video, which neither Language Reactor nor Trancy supports. With a 4.92/5 rating on the Chrome Web Store, it is the highest-rated tool in the category.
Frequently Asked Questions
Is Language Reactor free?
Language Reactor has a free tier that includes basic dual subtitles on Netflix and YouTube. However, features like vocabulary export, machine translations, phonetic transcriptions, and the catalogue mode require the Pro plan at $6 per month. The free version is functional for casual learners, but serious students will likely need Pro.
Does Trancy work on Netflix?
Yes, Trancy supports Netflix along with YouTube, Disney+, Coursera, TED, and several other platforms. Basic Netflix support is available on the free tier, but advanced features like AI grammar analysis, unlimited sentence replay, and full vocabulary tools require the $8/mo Pro plan.
What is the best free alternative to Language Reactor and Trancy?
FunLingo is the best free alternative. It provides dual subtitles, word-level translations, pronunciation audio, AI grammar explanations, and vocabulary saving across Netflix, YouTube, and Prime Video — all at no cost. Unlike the free tiers of Language Reactor and Trancy, FunLingo does not restrict any features behind a paywall.