Frequently asked questions.

No. Koboshi is a vocabulary memory app you use beside your other tools — not a course, not a tutor, not a replacement for learning grammar.

No — use it beside Duolingo, not instead of it. Each tool does its own job: Duolingo for daily habit, ChatGPT for instant explanations, a tutor for live correction. Koboshi is the memory layer underneath them all, keeping the words those tools surface and bringing them back until they stick.

AI builds the cards for you, the workflow is multilingual by default, and there is zero deck-building setup. Anki is powerful but manual. Koboshi is the same memory science without the busywork.

Yes. Koboshi gives you a prompt to drop into your ChatGPT thread, and it turns the words you have been discussing there into a clean CSV. Upload that file and your library is ready to review.

Yes — it is built for multilingual learners. Look a word up once and compare its meaning and nuance across every language you know.

It is built for exactly that: the intermediate vocabulary wall, and the retrieval speed you need to follow fast, natural speech.

Koboshi is free while it is in beta. There is no card required to start and no paid plan to choose right now.