Personalized deck · built from native content

A vocabulary deck built entirely around the topic you love.

Pick something you’re into. We build your deck from real native content about it, then hand you the videos it came from — so you learn the exact words and watch them live.

Try it free — get a mini deck Preview a real card

Free 20-word mini deck · no sign-up, no card needed

From $12, one-time. No subscription, no streak, no lock-in.

Storytelling·日本語
pay off foreshadowing
Flip to see the word in 日本語 ↻
Storytelling·日本語
伏線を回収する

序盤から張っていた伏線を回収していく展開が鳥肌ものでした。

“The way the story paid off all the foreshadowing from the beginning gave me goosebumps.”

See a real example topic in the language you want to learn.

Select your target language and tap a card to flip it.

You speak English

Loading example…
The immersion tax

You spend more time building cards than studying, and still can’t follow the videos you’re doing all this for.

Mismatch

You started with a community deck. It taught you textbook sentences.

“The woman had a suitcase.” “The library is near the station.” Sentences like these fill every premade deck: clean, textbook, written for a class of learners. It’s not how anyone talks in the content you actually watch.

Grind

So you tried building your own. Now you build cards more than you study.

Pausing the video, looking up the word, grabbing the screenshot, formatting the card. Sentence mining turned into the hobby, the tooling you maintain instead of the language you wanted to learn.

Locked

Either way, you still can’t watch the videos that interest you.

Common-word decks are fine as far as they go. But the channel that actually pulls you in, the true-crime one or the cooking streams you binge, sits filed under “advanced,” years down the list. The exact vocabulary that would let you watch it is the vocabulary you’re told to wait for.

How it works

From your topic to your deck, in five steps.

Step 1

Type in your topic.

Whatever interests you most and would pull you deepest into the language — you type it in yourself. It doesn’t have to be on any list.

A few of the topics people are learning from. Yours goes straight in, however specific.

Step 2

Pick your language pair.

Native language in, target language out — any of 14 languages, in any direction. No forced detour through English.

JapaneseEnglish
14 languages · any pairing · your native language is just a setting

196 possible directions. English, French, Spanish, German, Italian, Portuguese, Dutch, Czech, Russian, Ukrainian, Japanese, Korean, Chinese, Hindi.

Step 3

We build it from real native content.

We scrape and analyze native content on your topic, so the vocabulary is genuinely frequent, not guessed. Most decks are ready within the hour — we email you the moment yours is.

Step 4

Play it anywhere, or import your Anki file.

Audio playlists you can run in the car, on a walk, doing the dishes — no screen needed. Prefer flashcards? The .apkg imports with zero config, guide included.

Audio playlist250 clips
混色 · konshoku
Watercolor deck · track 12 of 250
12混色 — color mixing 0:14
13重ね塗り — glazing0:11
14陰影 — shadow0:13
immersion-deck.apkgimport into Anki · zero-config
Step 5

Start your immersion in your dashboard.

Your deck lands with up to ten handpicked videos, each with its key words pulled out. Watch the content the words came from, then follow the channels you like to keep going.

What you can build it for

Whatever you’d happily spend an evening watching. That’s a deck.

Anime & manga
City pop
K-pop
True crime
Pottery
Woodworking
Climbing
Korean cooking
Natural wine
Specialty coffee
Football tactics
Startups
Investing
Philosophy
Your topic isn’t on the list? That’s the point. The deck is built on demand, from the real content about your thing.
How it’s different

No matter your topic, you’ve probably tried one of these first.

Immersion Deck won’t teach you grammar or hold a conversation with you. It does the one thing the others get wrong: the exact words of the thing you love, straight from native content. Run it next to a class or an app, or on its own.

Coming from…
Where it leaves you
Immersion Deck
Premade / community decks
Fine for your first words. But the sentences are built for a classroom — “The cat drinks the milk” — not how anyone talks in what you watch.
Every card comes from native content on your topic. The words you’re about to actually hear.
Gamified apps
Good for a daily habit. But you can hit a 500-day streak and still not hold a casual conversation with a native speaker.
No streak, no XP. The living vocabulary of your topic, ready to check against real videos.
Sentence mining
Doable, and free. It costs you the evenings instead: pausing, looking up, screenshotting, formatting, tuning Anki.
A high-quality, personalized deck, built for you in about an hour. Zero setup. You spend the time studying, not building.
Classes & textbooks
The best way to build grammar. But the vocabulary is generic, and your topic sits years down the syllabus.
Built around your topic now, for $12 once. The words a class saves for “later,” today.
What you get

Everything lands in your dashboard the moment it’s built.

Here’s what actually arrives: a topic deck, a starter video library to actually watch, and audio you can run hands-free, all waiting in your dashboard.

supadeck.app / dashboard
Video library10 videos · JA → EN
Handpicked native channels on Startups · key words pulled from each
12:04
スタートアップ研究所
資金調達黒字化事業計画
09:31
経営の教科書
売上利益率顧客獲得
15:33
起業のリアル
市場開拓資本損益分岐
Fair questions

What you’re probably thinking.

I can already do this for free.

You can. This doesn’t sell you access to the language: it sells you the hours you won’t spend hunting for clips, mining subtitles, sourcing audio, and guessing what’s frequent. The free stack works. It just costs you the one thing you’ve already spent too much of: time.

I’ve tried everything. Nothing stuck.

Then you already know the tools weren’t the problem: what you were memorizing was. Here, every word comes from the topic you’re interested in, so nothing you learn is generic — everything points at the content you want to understand.

This sounds like another dream-seller.

No “fluent in a month,” no secret hack. Prices and limits are on this page in plain sight, there’s a free working sample, and a section below tells you who this isn’t for. That’s the opposite of how dream-sellers operate.

A premade deck won’t fit my topic.

This isn’t premade. It’s generated from native content on your topic, in your language pair. The vocabulary is yours specifically, not a list shared by ten thousand other people.

Anki is too complicated.

The deck comes already in the right format, with nothing to configure. Import one file and start. An import guide is included, and if you don’t want to use Anki, no problem — you can use the audio-only mode.

Honesty first

Who this is not for.

You want a game with points, hearts, and a daily counter. This has none of that — only what you can say.

You’re an absolute beginner who just wants your first everyday phrases, with no topic you actually love. That’s First Conversation — phrases about your own life, from day one.

You want a guaranteed fluency date. We don’t sell one. We sell the vocabulary and the ramp; the consistency is yours.

Pricing

One-time purchase. No subscription. Every limit stated.

Immersion Deck · Core
$12
one-time purchase
  • 250 words that actually recur in your topic — mined from real native content and kept only if it shows up across several sources, complete with the sentence it lives in and its audio
  • Starter video library in your dashboard
  • Audio playlists
  • .apkg file + import guide
Create your deck

Same topic either way. Core (250 cards) gives you its everyday vocabulary; Deep (500 cards) keeps going into the rarer, more specialized words from the same native content.

Add more topics and each one costs less. The discount comes off the quantity you get at once — no bundle to overpay for.
−10% for 2−15% for 3−20% for 4+

Every deck includes the .apkg file, audio playlists, an import guide, and a starter set of videos.

FAQ

The questions everyone asks first.

14, in any direction: English, French, Spanish, German, Italian, Portuguese, Dutch, Czech, Russian, Ukrainian, Japanese, Korean, Chinese, Hindi. Your native language is a setting, so you don’t have to learn through English.

Good. The deck is built on demand from the real content about your topic. Niche is exactly where generic lists fail and this works.

No. The deck imports in two minutes with zero configuration, and there’s a guide. Prefer not to use Anki? Use the audio playlists.

Extracted from real native content on your topic, kept only when it recurs across multiple sources, so you study what’s genuinely frequent, not a generic list.

That depends on you, and anyone who gives you a number is guessing. What we can say: 15-30 minutes a day on the right vocabulary beats hours on the wrong vocabulary. We sell sustainability, not speed.

Yes. No forced lesson order, no path to stay on. Study what you need, when you need it.

Flip a few real cards first, free and in your language. You’ll see exactly how a deck is built before you pay.

Create your own deck now.

A vocabulary deck built around your topic, in your language pair, ready within the hour. One-time from $12 — no subscription, no streak.