> For the complete documentation index, see [llms.txt](https://manual.trancy.org/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual.trancy.org/en/overview/about-trancy.md).
# About Trancy
Trancy is an AI-powered immersive language-learning tool, available as a browser extension and a mobile app, that turns the videos, web pages, and PDFs you already enjoy into personalized study material. It pairs accurate bilingual subtitles on YouTube, Netflix, and other sites with AI translation, vocabulary tools, and speaking practice so you learn from authentic content.
Learning a language doesn't have to be about rote memorization. Instead, there are many effective and enjoyable ways to learn a new language, such as through immersion, conversational practice, and engaging with authentic materials like movies, music, and books. By focusing on developing a deep understanding of the language and its structure, as well as building your vocabulary and grammar skills, you can learn a language in a more meaningful and sustainable way.
> **Our goal is to make learning language not boring anymore, We are trying to open up a new world of language learning for you.**
### Where you can use Trancy
On desktop, Trancy adds AI bilingual subtitles across major streaming and learning platforms. On mobile, video learning is currently focused on YouTube, plus podcast learning on iOS.
| Platform | Availability | Notes |
| -------- | ------------------ | ------------------------------------------------------------------------ |
| YouTube | Desktop and mobile | Bilingual subtitles plus AI Subtitle 2.0; the main video focus on mobile |
| Netflix | Desktop | Bilingual subtitles |
| Disney+ | Desktop | Bilingual subtitles |
| Udemy | Desktop | Course subtitles |
| Coursera | Desktop | Course subtitles |
| TED | Desktop | Bilingual subtitles |
| edX | Desktop | Course subtitles |
| HBO Max | Desktop | Bilingual subtitles |
Trancy is available as a browser extension for Chrome, Edge, and Firefox, a web-based Learning Center, and native mobile apps for iOS and Android. The team continues to expand platform support and to turn more video, web, and podcast content into language-learning material.
> EDITOR TODO: Confirm the canonical platform list against the extension manifest content\_scripts and the /ai-subtitle page. HBO Max is confirmed (live /pricing free-tier line plus homepage body) and is included above. Amazon Prime Video and Khan Academy appear in some older sources but not the latest homepage; they remain omitted until the manifest confirms them. If Khan Academy is added later, standardize the spelling to "Khan Academy." Trancy's marketing surfaces are self-inconsistent, so do not derive this list from the homepage hero or meta description.
### What Trancy can do
Trancy brings AI to every step of learning from real content. Its capabilities fall into six areas: video subtitles, web-page translation, PDF translation, AI speaking practice, the Learning Center, and mobile apps. The list below gives you a quick map; each area has its own detailed page.
* Video subtitles: accurate AI bilingual subtitles, plus Theater Mode and Read Mode for focused listening and reading practice.
* Web translation: immersive full-page and selected-text translation with word and sentence lookups while you browse.
* PDF AI Translator: bilingual translation of PDF documents using your choice of AI engine.
* AI speaking practice: AITalk conversation practice and pronunciation scoring to build speaking confidence.
* Learning Center: save words and sentences, then review them with Practice Mode and your Wordbook.
* Mobile apps: iOS and Android apps that bring subtitle learning and speaking practice to your phone.
### Who Trancy is for
Trancy is built for self-directed language learners who want to study with authentic content rather than textbooks: people learning English or another language through YouTube and Netflix, readers tackling foreign-language articles and PDFs, and anyone practicing listening and speaking from real media. It supports learning across up to 10 languages.
Trancy reports 700,000+ users worldwide across all platforms (per Trancy, June 2026). On the Chrome Web Store specifically, the extension shows around 300,000 users with a 4.71 rating from 2,691 reviews.
### Frequently asked questions
**What is Trancy?**
Trancy is an AI-powered language-learning browser extension and mobile app. It adds bilingual subtitles to video, translates web pages and PDFs, and offers AI speaking practice so you can learn from content you already enjoy.
**Which platforms and devices does Trancy work on?**
Trancy runs as a browser extension on Chrome, Edge, and Firefox, in a web-based Learning Center, and as native apps on iOS and Android. On desktop it adds subtitles across major streaming and learning sites; on mobile, video learning currently centers on YouTube.
**Is Trancy free?**
Trancy offers a free tier and a paid Premium subscription that unlocks the advanced AI features. Because the exact split between free and Premium features changes over time, see the [Premium ](/en/billing-and-plans/premium.md)and [Subscription ](/en/billing-and-plans/subscription.md)pages for current details.
**Who makes Trancy?**
Trancy is developed by L2D LIMITED.
*Last updated: June 4, 2026.*
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