Comprehensible Input
— Krashen, 1985You acquire a language by understanding content slightly above your level. Bilingual sentence pairs make any video i+1.
ACQUISITION — NOT STUDY
You don't study a language. You acquire it.
Steeping pairs every sentence of any YouTube video — or any text — with your language, so you understand it. That's how you got your mother tongue: no grammar drills, no vocab lists, no streaks. Your brain does the rest.
No grammar drills · No vocab lists · No streaks
— NOT LEARNING. ACQUISITION.
Four findings. One method.
Forty years of second-language research point to one thing: you acquire a language the moment you understand it — not by memorizing it. Steeping invented none of this. It just made it usable.
Listening-Reading
— Atamian; ArguellesWhen the original and its translation arrive in the same beat, your brain maps sound to meaning. No conscious translating.
Shadowing
— Arguelles; ATA standardRepeat any sentence aloud in the gap after it plays. The interpreter's training method, in your ear.
Affective Filter
— Krashen, 1982Anxiety blocks acquisition. So no quizzes, no streaks-as-shame, no forced output. You just listen.
Rooted in research — not ours
Comprehensible input is the consensus of 40 years of language-acquisition research. Check it yourself:
— A SESSION
Drop. Listen. Walk away with an hour of input.
One session is twenty minutes. No sitting down to study, no drills. Headphones on — commute, cook, walk — and the day starts acquiring.
01
Drop in what you want to hear.
A YouTube URL or paragraphs of text — anything in the language you're learning.
02
We line every sentence up.
Steeping extracts and aligns each sentence with its translation, sentence by sentence.
03
You listen, in two languages.
Original audio, then your language, then the next sentence. No pausing. No translating in your head.
04
Loop, shadow, or just walk.
Tap a line to loop it. Repeat aloud if you want to. Stop when you want. Sessions save to your library.
WHY MOST APPS DON'T WORK
Thousands of flashcards. Two years of grammar. You still can't speak.
That isn't a discipline failure — studying was never the road to fluency.
Take the studying out, and acquisition begins.
— BRING YOUR OWN
Two ways in. One way to acquire.
Drop a YouTube URL or paste any text. Steeping pairs every sentence with your language — you just understand, and your brain acquires the rest.
Robot voice is free. No credit card required. Signup takes 30 seconds.
— PRICING
Two tiers. That's it.
Robot voice, free. Human voice, in Pro.
Free
$0/mo
Robot voice
3,000 credits / week (≈ 1,600 words of Standard voice)
- · Sentence Mode on any video or text
- · 30-day history
- · Save sessions
No credit card required
Start freePro
$7.50/mo, billed $89.99/yr
Human voice (Google + ElevenLabs)
60,000 credits / month (≈ 32,000 words Standard or ≈ 4,800 words Realistic)
- · Up to 5,000 chars per request
- · Unlimited history
- · Audio downloads
Save ~42%. Cancel anytime
Choose Pro— START YOUR FIRST SESSION
Twenty minutes. Headphones on.
Free to start, no credit card. No studying, no memorizing — bring a video you've always wanted to watch, and start understanding it.