Language Reactor
Language Reactor is built for watching
It makes native content understandable while you watch: two subtitle tracks, word popups, phrase saving. As an input tool it’s excellent — but the saved list is where its loop ends.
YabLab vs Language Reactor
The Language Reactor alternative that makes saved words stick.
Language Reactor turns Netflix and YouTube into comprehensible input — dual subtitles, instant dictionary, a growing list of saved items. YabLab picks up where the list ends: cards that come back on schedule, writing checks, and drills built from your own mistakes.
- Spaced-repetition flashcards
- Writing checked as you type
- Drills from your own errors
Input tool vs full loop
YabLab
YabLab is built for the whole loop
Words you save while browsing or watching become flashcards scheduled by spaced repetition. And when you write, YabLab checks it, explains mistakes in your language, and turns them into practice.
Side by side
Both live in your browser. They stop at different points.
Feature Language Reactor YabLab
Dual subtitles on Netflix Yes — its home turf Not yet
Learn words from YouTube Yes — subtitle popups Yes — save words straight from the subtitles
Save words while reading any page Limited — mainly video and text mode Yes — any page, one click
What happens to saved words A list you can export Flashcards with spaced repetition, reviewed until learned
Checks your writing No Yes — as you type, with explanations in your language
Practice from your mistakes No Yes — drills built from your personal error profile
Progress you can see Saved-item count Error profile: rules at risk, defeated, vocabulary growth
The honest split
Keep Language Reactor if…
- Netflix with dual subtitles is the core of your routine
- You mostly want smoother watching, not a study system
- You already export your saved words into another SRS tool
Choose YabLab if…
- Your saved words pile up and never come back
- You understand a lot but still write with mistakes
- You want one place where input turns into review and practice
- You want progress measured in defeated mistakes, not list length
What YabLab does
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Write without mistakes
Underlines a slip, explains it in your language and fixes it — in the browser and on a Mac.
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Understand everything
Select a word on any website for its translation, meaning and examples. Works on a Mac too: ⇧⌘Y in any app.
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Remember it
Words come back as flashcards just as you start to forget them.
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One-click flashcards
Translate it, and it’s a card.
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Dual subtitles
YouTube in two languages.
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Ask YabLab right where you are
No chatbot tab, no lost context.
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Simpler text
Any paragraph, at your level.
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Your words, highlighted everywhere
On any site — even on your Mac.
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Drills from your mistakes
Practice what you get wrong.
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See your progress
Fewer mistakes every week.
YabLab vs Language Reactor — FAQ
Can I use both together?
Yes, and it’s a genuinely good combo: Language Reactor for Netflix input, YabLab to make words stick and to work on your writing. They don’t conflict in the browser.
Does YabLab work with YouTube?
Yes — you can save words while watching and they become flashcards in your review queue.
Why spaced repetition instead of a saved-words list?
A list grows; memory doesn’t — unless words come back at the right moment. YabLab schedules each card just before you’d forget it, so a 500-word list becomes 10 minutes of review a day.
Is it free?
Yes — the free plan covers saving words, reviews and writing checks. Pro removes the limits.