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 app and browser extension. Explore Chinese subtitles for pinyin and meaning, save useful words, and review them with spaced repetition.
Start learning in the web app
Works in Safari, Firefox, and mobile browsers. 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
我刚到成都的时候，对这里还不太熟悉。★
0:00 / 0:15
↑Extension overlay — tap or hover a word to explore
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
Start free, then upgrade only if you need more
Create a free account without entering a credit card. Paid prices below are loaded from Rolko’s configured Stripe plans rather than copied into this page.
Starter
$4.99/month
Or $4.17/month on annual billing, billed $49.99/yr.
Plus
$12/month
Or $8.25/month on annual billing, billed $99/yr.
Pro
$15/month
Or $12.42/month on annual billing, billed $149/yr.
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 entering a credit card. Paid Starter, Plus, and Pro plans are available when you need more.