Made for language learners and curious readers

Turn what you read into what you remember.

Highlight any word on any page. Vocalabs makes a flashcard. Spaced repetition handles the rest.

Free forever tier · No sign-up required · Works offline

en.wikipedia.org/wiki/Spaced_repetition

Spaced repetition

Spaced repetition is an evidence-based learning technique that takes advantage of the psychological spacing effect. It uses increasing intervals of time between subsequent review of previously learned material to exploit the natural forgetting curve.

psychologicaladj.

Definition

Relating to the mind or mental processes.

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One

Highlight anything, anywhere.

See a word you don't know? Select it. Works on every website: news, blogs, Wikipedia, docs, PDFs. No context switching.

Vocalabs is a Chrome extension that turns highlighted words into flashcards you'll actually remember over time.

Two

A dictionary lookup, plus context.

Vocalabs pulls the definition, part of speech, and the sentence you found it in. Every card remembers where it came from.

mercurial adj.

Definition

Subject to sudden or unpredictable changes of mood or mind.

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Three

Progress you can feel.

Streaks, retention, 30-day history. Watch your vocabulary grow. Cards you've mastered feel earned. The ones slipping get more attention.

247Words

84%Retention

12Day streak

Why it works

Your brain forgets on a curve. So we review on one.

Without review, most of what you learn slips away within days. Vocalabs uses the SM-2 algorithm (the science behind Anki, 暗記) to schedule reviews right before you forget, at the moments where re-encountering a word does the most work.

Each dot is a scheduled review. Every time you recall a word, the interval to the next review grows. A few minutes a day is enough to keep hundreds of words permanently in place.

Everything included

Built for how you actually read.

Every feature earns its place. No bloat. No dark patterns. No syncing your reading habits to some ad server.

Instant capture

Highlight and save in one click. Works on every website: news, docs, PDFs, Wikipedia, wherever you read.

True spaced repetition

The SM-2 algorithm (the one behind Anki, 暗記) picks what to show you and when. Science, not vibes.

Context preserved

Every card remembers the sentence it came from and links back to the source. Reading it again clicks the memory in.

AI when you want it

Optional integration with Anthropic, OpenAI, Google Gemini, or OpenRouter. Free tier with Gemini. Your key, your rules.

Translation mode

Learning a language? Turn on translation mode to get native-language translations alongside definitions.

Type to recall

Optional typing mode: write your answer before revealing. Active recall that actually sticks.

Sync to phone

Capture on desktop, review on the bus. Encrypted end-to-end. Opt-in only.

Yours to keep

Everything lives on your device by default. Export as CSV any time. Anki-compatible.

Cloze mode

Hide the word inside its original sentence and recall from context. The hard mode that actually works.

Pricing

Free forever. Or Pro for the price of a coffee.

Try Vocalabs with no sign-up and no card. Upgrade when you outgrow the free tier.

Free

Everything you need to try the app. No card required.

$0forever

No card. No sign-up.

Up to 50 flashcards
Full spaced repetition engine
Dictionary with offline fallback
Cloze mode, review shortcuts, CSV export

Add to Chrome

Coming soon

Pro

For serious learners and daily readers.

$5/ month

or $40/year (save $20)

Unlimited flashcards
AI translation & example generation
Cross-device sync (desktop + phone)
Priority support
Everything in Free

Lifetime

One payment. Yours forever.

$59once

All future features included.

Everything in Pro
All future features included
Support an independent maker
No renewals, ever

Questions

Straight answers.

Is it really free?

Yes, up to 50 cards. No sign-up required, no card asked for. The full spaced repetition engine is free. The paid tier removes the card limit and adds cross-device sync + AI.

Do I need to sign in?

Not to use the extension. Sign-in is only required if you want to sync between devices. Everything works locally otherwise.

What data do you collect?

Nothing personal by default. Anonymous install counts if you opt in: a random ID, extension version, browser family, and locale. No card content, no URLs, no email until you sign up for sync.

Do I have to configure AI to use it?

No. Vocalabs works fine with just the built-in dictionary, including an offline fallback for common words. AI is an optional add-on. Google Gemini has a generous free tier if you want to try it.

Can I export my cards?

Yes. CSV export at any time. Compatible with Anki, Mochi, and any spreadsheet tool. Your data is always yours.

Which browsers?

Vocalabs is a Chrome extension, which means it also works on Edge, Brave, Opera, and any other Chromium browser. Firefox support is planned.