Learn Languages While Watching What You Love
Watch Netflix, YouTube, Prime Video and Disney+ with dual subtitles, instant click-to-dictionary, a synced vocabulary bank, and an auto quiz right after the episode. No pausing. No googling.
One extension. Four streaming platforms.
Everything you need to learn from real content
A complete immersion toolkit built into your favorite streaming platforms.
Dual Subtitles
Two languages at once on Netflix, YouTube, Prime Video and Disney+.
Instant Dictionary
Click any word, Spanish, Japanese, Korean, Chinese, English, French, German, Italian, Portuguese and more.
Japanese Furigana
Automatic hiragana over every kanji while you watch.
5-Type Adaptive Quiz
Multiple choice, write, reverse, kanji↔reading. One language per session.
Auto Review After Episode
On Netflix, the quiz pops up right when the episode ends, while it's still fresh.
Dictionary-only Mode
Already understand the language? Keep native subs and just enable click-to-dictionary.
Vocabulary Bank
Save with one click, track status (new / learning / known), keep the show + episode context.
Cloud Sync
Your words follow you across devices and export to Anki anytime.
Japanese with AI
No Japanese subtitles for your anime? We search real fan subs and, if none exist, generate them with AI.
AI Japanese subtitles
Anime without Japanese subtitles? We generate them for you. What other apps charge extra for, here it's included.
How it works
Three steps. Then just press play.
Install the Chrome extension
One click from the Chrome Web Store.
Open your favorite streaming platform
Netflix, YouTube, Prime Video, or Disney+.
Learn naturally while watching
Dual subtitles and dictionary appear automatically.
Mix and match any language pair
From Japanese to Korean, German to Chinese, combine your target language with the one you already know.
今日は何を食べますか？
What are you going to eat today?
Das ist eine gute Idee.
That is a good idea.
정말 감사합니다.
Muchas gracias.
你今天怎么样？
How are you today?
Already fluent? Try dictionary-only mode
Keep the platform's native subtitles and just enable click-to-dictionary on top. Cleaner than dual subs, and you can still tap any word you don't recognize.
- Native subtitles stay untouched
- Click any word for an instant definition
- Save tricky words without pausing
Your personal vocabulary deck
Every word you save keeps its context (show, episode) and a learning status. Synced to the cloud, exportable to Anki in seconds.
Lock in what you just watched
When the episode ends on Netflix, a quiz with your saved words appears automatically, while everything is still fresh in your head.
Multiple choice
Word → meaning
食べる → to eat
Write & evaluate
Type what you remember
감사합니다 → ?
Reverse
Meaning → word
butterfly → Schmetterling
JP Reading
Kanji → hiragana
食べる → たべる
JP Kanji
Hiragana → kanji
たべる → 食べる
One language per session. Prioritizes words you haven't mastered yet, fills in with known ones if needed.
Loved by learners
"Dual Sub replaced constantly pausing videos to search words."
"The furigana and one-click dictionary are incredible."
"The best immersion tool I've found."
Frequently asked questions
Turn every episode into a language lesson
Install Dual Sub and start learning from real content today.
Add to Chrome