Karai turns YouTube, Netflix and Crunchyroll into lessons. Point at any word to see what it means, mine the sentence to Anki with its real audio and picture, and train your ear on the lines you've collected.
Free while in beta. Works on a Mac with Chrome. No card needed.
Pausing, copying a word into a dictionary and finding your place again turns one episode into an hour of busywork.
Flashcards made by hand lose the voice, the scene and the sentence, which are the things that make a word memorable.
Mine 50 cards in a weekend and reviews turn into a wall of words you barely remember seeing.
Karai isn't a course. It's a set of habits that research supports, made automatic, so the time you already spend watching turns into progress.
You learn best from content where you know nearly every word. Karai shows how much of each video you'd understand and recommends what's in your sweet spot.
Generic word lists teach words your shows rarely say. Karai counts the words in what you actually watch and puts the ones that unlock the most of it first.
A sentence where you know everything but one word is the easiest one to learn from. Karai finds those lines as they play and marks the word with a small star.
Karai sends cards to Anki, which schedules reviews, and adds quick quizzes on your own lines. It reads your Anki history to see what's sticking and what isn't.
Subtitles can become a crutch. Ear mode blurs them until you choose to peek, and tracks how many lines you followed by sound alone.
Karai counts the cards you haven't studied yet. At 15 it pauses the video and tells you to go review while the scenes are still fresh, then come back for more.
Research: lexical coverage and comprehension · vocabulary needed for TV (Webb & Rodgers) · spacing (Cepeda et al., 2006) · retrieval practice. Karai applies these ideas; it hasn't been tested in a study itself.
On YouTube, Netflix and Crunchyroll. New words in blue, learning words in violet, a hover card with the meaning that fits the line, Mexican and Latin American senses first.
The sentence, a clean screenshot, the line's audio, real people saying the word, the meaning, a Spanish-only definition and a word-by-word translation.
Every line, the current one glowing. Filter to lines with one new word, see where the hard parts are, and jump anywhere.
Blurred subtitles with peeks, slow-normal-fast replays and shadowing with your own voice played back.
Your mined lines as an auto-playing reel, and a listening quiz on the real audio, with streaks that get louder the better you do.
Words known, time immersed, ear score and your Anki retention, each with a plain definition of how it's counted.
Karai started as Dakarai Haynes's personal tool for learning Mexican Spanish from Netflix and YouTube. Every feature exists because it fixed a real problem in his own studying. Here are his numbers today:
Yes, free for everyone in the beta. If Karai becomes paid later, beta testers will hear about it first, and nothing changes without notice.
A Mac and Google Chrome. Anki (free on Mac) is strongly recommended for flashcards. Karai runs on your own computer, and the Chrome extension adds its subtitles to YouTube, Netflix and Crunchyroll.
Spanish (Mexican and Latin American first) and Japanese, with furigana. More languages are coming: pick the one you want next when you join, and the most-requested ones come first.
Not yet. Mining works best on a laptop. Your cards go to Anki, which you can review on your phone.
Your words, cards, screenshots and audio stay on your computer and in your Anki. Only your email (if you join the beta) and problem reports you choose to send reach our server. Karai only reads subtitles the site already sends to your browser and never touches video protection.
Join the beta and we'll send you the download and a 5-minute setup guide.
More languages are on the way. Tell us which one you want and the most-requested come first.