Learn English with the shows you already watch

Know the words before you press play

Pick tonight’s episode. Duck finds the words you don’t know yet — at your level — and teaches them to you before you watch.

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Real decks from real subtitles Spaced-repetition flashcards AI tutor built in

See for yourself

A tiny sample deck — four cards, one minute.

1 · Set your level

A2 B1 B2 C1+

2 · Pick a title

A Knight of the Seven Kingdoms A Knight of the Seven Kingdoms Stranger Things Stranger Things Fallout Fallout The Office The Office Better Call Saul Better Call Saul Ted Lasso Ted Lasso Pulp Fiction Pulp Fiction Forrest Gump Forrest Gump Soul Soul Don't Look Up Don't Look Up The Fifth Element The Fifth Element
100,000+ movies and episodes inside

3 · Pick the words to learn

C1

(one's) livelihood

the work that earns you your living

Added Ignored
C1

wallflower

a shy person who keeps to the edge of the room

Added Ignored
C1

astral traveller

someone whose spirit leaves the body and roams

Added Ignored
C1

untethered soul

a soul cut loose from its body

Added Ignored
Your deck · 0

Learn before you watch

Preview the words

C1

untethered soul

a soul cut loose from its body

Pick your episode — we’ll suggest words and phrases from it, just above your level.

Enjoy — and notice

Illustrative excerpt from Soul, © its owners

We've never connected an untethered soul back to its body before.

You catch the words you previewed — and that joy of recognition is a huge learning boost.

Remember forever

memory untethered soul 3 days 2 weeks 2 months forever

Each card comes back right before you’d forget it. The gaps grow until the word doesn’t need Duck anymore.

Stills are brief excerpts that illustrate how a word appears in a scene; posters via TMDB and TheTVDB. All titles and images belong to their owners. Copyright

Built on proven learning science

  • Just above your level — where you learn fastest
  • Real scenes, not word lists — you remember the scene, and the word comes with it
  • Spaced repetition, built in — the most proven method there is, with just two answers: know it, or still learning
  • Learn from what you love — strong feelings make strong memories
learning speed too easy your zone not yet ✓ dog ✓ week half measures lay low perfunctory obfuscate

Your tutor learns your vocabulary word by word — and the zone moves with you.

Ask about a phrase. It’s already a card.

Ask in the chat about any phrase and get a quick answer. Want to keep it for good? The card is already made — one tap adds it to your deck.

For the word nerds

The parts we built because we wanted them ourselves.

  • FSRS-6 scheduler — state of the art, zero knobs to tune
  • An MCP server: your AI agent adds, edits and finds cards from any chat
  • An HTTP API with your own token, for scripts of your own
  • Reviews stay in the app, so your schedule stays honest

API docs →

Works with
  • Claude
  • Codex
  • Hermes
  • OpenClaw
  • Grok

Your deck, in your favorite agent

  1. 1

    Connect your agent over MCP

  2. 2

    Ask it to:

    • add a word you met, with its sentence
    • make cards from any text
    • fix a card

Pricing

Free to start, free forever. Go Pro when you want more.

Free

$0

forever

  • Flashcards and spaced-repetition reviews
  • Ready-made cards from free episodes
  • Your tutor, with a one-time balance to start

Pro

$4.99/mo

or $34.99/yr · 5 months free · $2.92/mo

  • Everything in Free
  • A much higher monthly limit for your tutor, explanations, and examples
  • Study-ready cards from any episode — built for your level, so you skip the manual work

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Ready for tonight’s episode?

Free to start. The words are waiting.

Get started