Webpage learning in your study language
Use the browser extension to explore normal webpage text in your active study language on supported websites.
The canonical Rolko product guide
What is Rolko, and when should you use it?
Rolko is a language-learning web app and browser extension that turns supported subtitles, transcripts, and webpage text into interactive practice. Learners can look up pronunciation and meaning, save useful words, track vocabulary, and review them with spaced repetition. The extension is for supported desktop browsers; the web app also works on mobile.
Start learning
The web app works in every modern browser. No extension required.
Interactive product proof
See the connected subtitle workflow
This product demo uses the same interactive subtitle, dictionary, and vocabulary-state components as Rolko.
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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
Use Rolko when native content is your curriculum
Video and transcript workflows
Video-subtitle support is available for Chinese, Japanese, Korean, and English. Use available transcripts and pasted text in the web app.
One vocabulary and review loop
Save useful words, track what you know, and review saved vocabulary with spaced repetition.
Continue in Rolko
Read supported transcripts and pasted text
In the web app, supported transcripts and pasted text become a reading workspace with word lookup, vocabulary states, and coverage feedback.
Reading workspace
学中文的秘诀
Tap or hover a word for its pronunciation and meaning. Mark it as learned or learning.
Word Coverage
Learned: 50%Learning: 20%New: 30%
主持人
你学中文多久了？
嘉宾
大概三年了，但是每天都要练习。
主持人
有什么好的学习方法吗？
嘉宾
我觉得看中文剧最有用，边看边学。
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 study-language audio sentences per day
- Save 5 new words per day
- Spaced-repetition 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 study-language 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 study-language 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
A focused Language Reactor alternative for learning Chinese
Looking for a Language Reactor alternative focused on Chinese? Use Rolko to explore Chinese subtitles, save useful words and review them with spaced repetition.
A LingQ alternative for Japanese webpage reading
Compare Rolko with LingQ for Japanese reading. Try Rolko’s supported webpage lookup and word-state demo, then check the free and paid plan boundaries.
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.
A Japanese popup dictionary for the pages you choose
Read selectable Japanese webpage text with Rolko’s desktop browser extension. Lookup is free; saving new words requires a paid plan. Previously saved words remain reviewable.
A Japanese vocabulary tracker for real reading
Explore Japanese words in supported text with free lookup. A paid plan lets you save new vocabulary; previously saved words remain reviewable on Free.
A Korean vocabulary tracker for real reading
Explore Korean words in supported text with free lookup. A paid plan lets you save new vocabulary; previously saved words remain reviewable on Free.
Track Chinese vocabulary from real content, then review it
Track Chinese vocabulary from supported videos, webpages, and text. Follow available English subtitles and review saved words with spaced repetition in 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
Who is Rolko for?
Rolko is for language learners who want to learn from real subtitles, webpages, transcripts, and text while keeping useful vocabulary in one review system.
What works on mobile?
The Rolko web app works on mobile for reading text, managing vocabulary, and review. The browser-extension workflow is designed for supported desktop browsers.
Does Rolko work with every video or website?
No. Subtitle features need usable subtitle text on a supported page. Normal selectable webpage text can be interactive, but site structure and browser support can vary.
Does Rolko read text baked into images or video pixels?
No. Rolko works with supported subtitles, transcripts, and normal webpage text. Text baked into pixels requires OCR, which Rolko does not currently provide.
What is available with a free account?
You can create a free account without a credit card. Current free and paid plan boundaries are shown on the pricing section and pricing page.