Understand Chinese in context
Explore Chinese subtitle text for pinyin and an English meaning while the scene remains visible.
A separate Chinese-learning tool
A focused Language Reactor alternative for learning Chinese
Rolko is a separate Chinese-learning web app and browser extension. Explore supported Chinese subtitles and normal webpage text for pinyin and meaning for free. Saving new words requires a paid plan; previously saved words remain reviewable on Free. The extension workflow is for supported desktop browsers, and Rolko is not affiliated with Language Reactor.
Start learning
The web app works in every modern browser. No extension required.
Interactive product proof
See the Chinese-learning workflow before you install
This interactive Rolko demo uses the same subtitle lookup and vocabulary states as the product experience.
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学中文说汉语听读
后来我发现，这座城市比想象中更温柔。★
0:00 / 0:15
↑Extension overlay — tap or hover a word to explore
■ learned■ learning■ new word
Product workflow
A connected workflow for Chinese immersion
Keep the words that matter
Save useful vocabulary from supported subtitles or webpages and sync it after signing in.
Review what you encountered
Use spaced repetition to revisit saved vocabulary in the companion web app.
Continue in Rolko
Turn a subtitle into a word you can review
Words you save can move into Rolko’s spaced-repetition review flow instead of staying in a separate lookup history.
Review
Vocab Review
加油
今天的比赛很重要，大家一起加油吧！
Real plan prices
Choose the plan that fits your learning
Compare features and current prices below.
Starter
Light daily learning$3.99/month
Or $2.42/month on annual billing, billed $29/yr.
- 100 translations per day
- 10 Chinese audio sentences per day
- Save 5 new words per day
- Spaced-repetition and Tone Review
Plus
Recommended$6.99/month
Or $4.08/month on annual billing, billed $49/yr.
Everything in Starter, plus:
- Unlimited word saving
- Higher translation and Chinese audio limits
- Built for consistent daily learning
Pro
Serious learners$14.99/month
Or $8.25/month on annual billing, billed $99/yr.
Everything in Plus, plus:
- 1,000 AI translations every 5 hours
- 1,500 Chinese audio characters per day
- Priority feature requests
- Generate interactive subtitles from uploaded audio or video (Coming soon)
- Interactive subtitles for Douyin and Bilibili (Coming soon)
Related Rolko answers
Continue with the workflow you need
What is Rolko, and when should you use it?
Rolko is a language-learning web app and browser extension for interactive subtitles, webpage text, vocabulary tracking and spaced-repetition review.
Learn Chinese with Netflix subtitles
Learn Chinese with supported Netflix subtitles on desktop. Explore words for pinyin and meaning, save vocabulary and review it later with Rolko.
Learn Chinese with YouTube subtitles
Learn Chinese with supported YouTube subtitles. Explore words on desktop or import an available Chinese transcript into the Rolko web app.
Read Chinese webpages. Review the words you save.
Look up pinyin and meanings on selectable Chinese webpages with Rolko’s desktop Chrome extension. Lookup is free; saving words requires a paid plan.
Connect the Chinese you read and watch to the words you review
Turn Chinese words from supported subtitles, webpages, transcripts and imported text into one connected vocabulary and spaced-repetition review routine with Rolko.
How to understand Chinese characters in videos
Learn when Rolko can make Chinese subtitles or transcripts interactive and when Chinese text baked into video pixels requires a separate OCR tool.
Common questions
What to know before you start
Is Rolko affiliated with Language Reactor?
No. Rolko is a separate product and is not affiliated with, endorsed by, or operated by Language Reactor.
What does Rolko help me do?
Rolko helps you explore Chinese subtitles and webpage text, save useful words, and review saved vocabulary with spaced repetition.
Where can I use the browser extension?
Install it from the Chrome Web Store for a supported desktop browser. Rolko supports Chinese learning on supported YouTube and Netflix watch pages and on webpages.
Can I use Rolko on mobile?
Yes. Use the Rolko web app on mobile to read Chinese text and work with your saved vocabulary. The browser-extension workflow is for desktop.
Can I start for free?
Yes. You can create a free account without a credit card and use basic lookup. Saving new words requires a paid plan; previously saved words remain reviewable on Free. Compare current Starter, Plus, and Pro details before subscribing.