Learn any language you want with content that you want to watch.

LingoFuse

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Automatic generation of flashcards and other exercises using

Learn any language with content you already watch.

Paste a YouTube URL and LingoFuse generates vocabulary flashcards with real clip audio and context from the video - not generic word lists.

Flashcards from YouTube videos

YouTube flashcards and spaced repetition

Review cards in SRS decks so vocabulary from your favourite creators sticks long after you watch. Know it, not sure, or don't know - the deck adapts.

Spaced repetition with YouTube

Reliable and robust tool to achieve your goals.

Learn

you want with content that you already watch.

any language

with content you already watch.

Join this session

Download LingoFuse and turn your watch time into study time.

Start learning from content you love

No premade decks, no textbook sentences. Paste a link and get flashcards built from the exact words the video uses: cooking shows, podcasts, vlogs, whatever you already watch. Every card keeps the full sentence as context.

Flashcards from any YouTube video

Every card plays the original clip, so you learn pronunciation from real voices in real context, not from a robotic text-to-speech engine.

Hear it from native speakers

LingoFuse includes starter decks so you can begin practicing the moment you install. Free, and without a single ad.

Free starter decks. Zero ads.

Learn any language

Paste a link

Vocabulary from the video, with full sentences as context.

Get flashcards

Practice with content you actually care about.

Learn daily

LingoFuse turns any YouTube video you choose into flashcards with real native audio. Free on iOS and Android.

We'll use this in the generator. You can change it anytime in Profile.

Which language do you want to learn?

You control which task part students see and play the video from your screen. Students follow along without their own video playback.

Live Lesson Mode

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Google login does not work in Expo Go. Install the LingoFuse development build once (eas build --profile development --platform ios, or npx expo run:ios), then run yarn start and open that app instead of Expo Go.

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We'll translate your flashcards into this language. You can change it anytime in Profile.

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We'll translate your flashcards into this language. You can change it anytime in your Profile settings.

Select your native language

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Information from sign-in providers (for example Google or Apple’s Sign in with Apple), such as your name, email address, and profile image (depending on what you share with the provider).

Content you submit for generation, such as YouTube links, uploaded MP4 files, text prompts, and language selections.

Your tasks/exercises, subscription/credits status, and basic settings.

Basic logs needed to operate and secure the Service (for example IP address, device/browser information, timestamps). In our mobile app we also collect diagnostics (crash reports and error logs) and product-usage analytics (screens viewed and in-app actions). This information is linked only to a pseudonymous account identifier, not to your name or email.

1. What we collect

2. How we use your data

On the website, subscription payments are processed by Stripe. We do not store your full payment card details on our servers. Stripe processes payment-related data according to Stripe’s policies.

On the iOS app, auto-renewable subscriptions are purchased through Apple In-App Purchase. Apple processes payment information for those purchases; Apple’s handling of that data is described in Apple’s privacy policy and terms. We receive information from Apple that we need to validate access and manage subscriptions.

On the Android app, auto-renewable subscriptions are purchased through Google Play Billing. Google processes payment information for those purchases; Google’s handling of that data is described in Google’s privacy policy and terms. We receive information from Google that we need to validate access and manage subscriptions.

3. Payments (web and App Store)

We share data only as needed to run the Service, for example with service providers that help us with authentication, payments, hosting, storage, and video processing. We also use Google’s generative AI services (Gemini) to create tasks and exercises from your Inputs; when you request generation, relevant Input (such as prompts, language selections, and material derived from submitted video or links) may be sent to Google for processing, in line with Google’s terms and policies. We do not sell your personal data. We may also share data to comply with legal obligations. For our mobile app we use Sentry for crash and error reporting and PostHog for product analytics; both are configured to store data in the European Union and receive only a pseudonymous account identifier, not your name or email.

4. Sharing and processors

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We use cookies and similar technologies primarily for authentication (keeping you signed in), security, and basic preferences. You can control cookies through your browser settings, but some features may not work properly if cookies are disabled.

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New here or want a refresher? Replay the interactive tour of the app.

Tutorial

Available on iOS and Android

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Title

In your decks you'll find flashcards to study. We've prepared some demo decks to get you started, but the real magic is learning from videos you actually find interesting.

Decks

Every deck is built from content you add from YouTube. A deck can be made up of many videos.

Videos in a deck

Pick a language that interests you and try a demo deck with the Start Learning button - or head to the Generator and create your own flashcards.

You're all set!

Paste ANY YouTube link and AI will turn it into flashcards. Pick videos about your passions or from your favorite creators - learning sticks best with content you actually want to watch.

Generator

Optionally type in what vocabulary should be picked from the video - e.g. cooking vocabulary, C1-level words, basic phrases, pronouns, or verbs. AI will do its best to adapt to whatever you type here.

Steer the vocabulary

Here you switch between the languages you're learning.

Your languages

Control how many new flashcards each review session introduces.

New cards per session

Are you sure you want to skip the tutorial? You can replay it anytime from Profile.

Skip the tutorial?

These counters show how many cards are left: new, not sure and don't know. The session ends when you're familiar with all the words.

Session progress

Every card keeps the original audio from the video. Tap play to hear the word spoken by a native speaker.

Hear it in context

Click Know it when you knew the word, Not sure when it felt familiar but you weren't certain, and Don't know when you had no idea. Honest answers make the system work.

Rate yourself

Click the card to flip it and see the translation.

Flip it

You see a new word, the full sentence so you know the context, and a player with the original audio from the video.

Your flashcard

This book icon shows other meanings of the word, not just the one on this card.

Word meanings

A deck holds your flashcard sets and can combine flashcards from multiple videos. This button creates a new deck whenever you need one. No need to click it now, we've already prepared the Spanish for Beginners deck for you.

Create decks anytime

A deck can contain multiple sets, so you can learn from multiple videos in one deck. You can add and remove sets anytime.

Decks hold your sets

Here you can see your progress. With spaced repetition a word only counts as learned once it's in your long-term memory, so you'll need to click Know it several times in a row before it's learned.

Track your progress

We've prepared demo decks in multiple languages. Use them as a starting point for your learning journey.

Demo decks

Grab your new set at the top and drop it onto the deck we prepared. On mobile, press and hold the set first, then drag.

Grab your new set at the top and drag it down onto the deck we prepared.

Drag your set in

Happy learning!

Don't have a link? Search our curated catalog of videos in the language you're learning - organized by topic.

The language you're learning and your native language. You can change both anytime in your Profile.

Your flashcards are translated into your native language. You can change it anytime in your Profile.

Your native language

Let's use the generator to create your first set.

Step 1: generate your cards

Optionally tell the AI which words to pick, like a level or a topic, e.g. "cooking vocabulary" or "phrasal verbs". We've asked for basic A1/A2 vocabulary.

Choose which words

That's all it takes. The AI watches the video and builds your flashcards.

Generate!

Or paste any YouTube link. We've pasted a real video for you.

Choose a video

If you don't want to keep a card in your deck, remove it with Not interested.

Not interested?

Each session shows a set number of new cards (you can change how many in Settings), plus cards from previous sessions that are due for review.

Freshly generated sets land here. Next, let's organize it into a deck.

Your set has been created 🎉

Lingo Fuse uses a spaced repetition system (SRS): words you know come back less and less often, words you struggle with come back sooner. That's what makes them stick in long-term memory.

Spaced repetition

Your deck is ready. Let's review your first cards.

Time to start learning

You can learn a language from any YouTube video by turning it into flashcards with authentic video and audio.

Welcome to Lingofuse

Review flashcards every day to keep your streak going.

Your streak

In this tutorial we'll show you the key features - it takes less than a minute.

Welcome to Lingo Fuse!

Start making flashcards from YouTube

Frequently asked questions

How to make flashcards from a YouTube video

Spaced repetition (SRS) schedules reviews right before you forget a word. LingoFuse builds SRS decks from the flashcards generated from your YouTube clips - so vocabulary from creators you follow moves into long-term memory, not a one-time watch.

Spaced repetition with YouTube content

You remember faster when you hear the word in a scene you care about. LingoFuse keeps the clip, translation, and sentence context on each card - closer to immersion than drilling isolated words from a textbook.