How Manabit.ai Works: Learn Japanese Vocabulary by Reading

Most vocabulary apps ask you to memorize words in isolation: a card shows 食べる, you recall "to eat," you move on. That works for recognition, but it doesn't teach you how a word actually behaves in a sentence — its particles, its conjugations, the words it tends to appear next to. Manabit.ai starts from a different question: what if every word you're learning showed up in a real sentence, generated just for you?

The daily loop

Each day, Manabit.ai builds a short study session around the words you're due to review, plus a few new ones picked for your current level. Instead of a flashcard deck, you get a handful of short AI-generated texts — each one written to naturally include your target words, in a genre and tone you can influence (a diary entry, a news snippet, a casual conversation, and more).

You read the text first. Furigana and meanings stay hidden until you tap a word — so you're reading for real, not just scanning glosses. If a word trips you up, a tap reveals the reading; another tap reveals the meaning. Every text ends with a short comprehension quiz on your target words, so the app knows whether you actually got it or just recognized the shape of a sentence.

Spaced repetition, tuned to what you do

Behind the scenes, Manabit.ai runs a spaced-repetition algorithm (SM-2, the same family used by Anki) — but it doesn't just look at whether your quiz answer was right or wrong. It also factors in how you got there: did you need the furigana? Did you need the meaning? Answering correctly without any help schedules a longer gap before you see that word again; needing help schedules a shorter one. The goal is a review schedule that reflects what you actually know, not just what you clicked.

Why context first

Reading a word in a sentence forces you to notice things a flashcard never will: that 食べる takes an object marked with を, that its polite form is 食べます, that it shows up next to time expressions like 朝ごはんに. None of that is quizzed directly — it's absorbed the way it would be from reading real Japanese, just calibrated to a level you can actually follow.

If you've been stuck translating word-by-word in your head when you read real Japanese, this is the gap Manabit.ai is built to close: not more words memorized, but more comfort meeting them in context.