Learn languages from content you love
Save words from real content, understand them in context, and review them at the perfect time.
Learn from the internet you already use
Save words from videos, articles, stories, and real conversations — then review them with context.
How LexiSpark works
Save words from real content, review them with context, and remember them long-term.
Language learning, reimagined
We believe the best way to learn a language is through content you actually enjoy. Not textbooks. Not flashcards without context. Real videos. Real stories. Real conversations. That's comprehensible input — and it works.
Save words from real content
Click any word while watching videos or reading texts
Learn through context
Every word comes with the sentence where you found it, plus translation
Review at the right time
FSRS algorithm schedules reviews so you never forget
Everything you need to reach fluency
A complete ecosystem designed around Comprehensible Input and spaced repetition.
Turn videos into language lessons
Works on YouTube and HDrezka.kim, with experimental Netflix and Coursera support. Our scanner helps surface known vs unknown words before you start watching.
Review anywhere
Your progress syncs instantly across desktop, tablet, and mobile.
Never forget a word
Schedules reviews at the exact moment you're about to forget.
Track your mastery
Visualize your vocabulary growth with detailed heatmaps and streak tracking.
Practice conversations
Practice conversations using the exact vocabulary you've learned, with guided prompts that adapt to your review history.
02 — How It Works
How it works
- Install ExtensionInstall
- Watch Real Content
- Save Words in Context
- Review with FSRS
- Track Progress
Install Extension
Install the LexiSpark Chrome extension to get started. Save words from any website, video, or text instantly.
Install Chrome ExtensionWatch Real Content
Go to YouTube, Netflix, or any website with content in your target language. LexiSpark works where you already learn.
Save Words in Context
Click any unknown word to save it instantly. Every word is saved with the full sentence, translation, and audio.
Review with FSRS
Our FSRS algorithm schedules your reviews at the optimal time. No more forgetting what you learned.
Track Progress
Watch your vocabulary grow. Track comprehensible input percentage and retention rates over time.
03 — Reviews
Built for focused language learners
"Finally, a tool that lets me learn Spanish from the YouTubers I actually want to watch. The FSRS algorithm is noticeably better than Anki."
"The dual coding with video screenshots and audio snippets makes remembering vocabulary so much easier. Game changer."
One workflow for real language learning
Save words from the content you already watch, keep the original context, and review at the right time.
El sol brillaba sobre la ciudad mientras juegan en el parque.
Las flores crecen en el jardín.
Simple, transparent pricing
Start with a free trial, upgrade when you need more power.
Free
Perfect for getting started
- Browser Extension
- Up to 100 flashcards/mo
- Basic FSRS scheduling
- Web app access
Pro
Start with a trial, then keep learning without limits
- Free trial included
- Unlimited flashcards
- Advanced FSRS-6 algorithm
- Cloud sync across devices
- Audio & screenshot capture
- Detailed analytics
Lifetime
Pay once, learn forever
- All Pro features
- Early access to AI Tutor
- Priority support
- One-time payment
Frequently asked questions
Ready to learn languages the smart way?
Start with a free trial, build your vocabulary from real content, and review with science-backed scheduling.
Get Started for Free