Kasti

Master vocabulary that sticks

Provides personal meaning to move from passive recognition to active conversation

Kasti transforms vocabulary into active knowledge by focusing on how words function in the real world. Instead of isolated translations, manage your vocabulary across multiple entertaining contexts to drive long-term retention.

Personal meaning

Connect words to your real experiences for maximum retention.

Deep recognition

See how words function across multiple real-world contexts and nuances.

Active vocabulary

Move beyond passive understanding to confident, real-time conversations.

How Kasti builds your vocabulary

Curated sources

Pick as many sources as fit your goals—just like the different social media channels you already follow.

Personal additions

Translate, tag, and store any word you come across—inside or outside the app. Coming later this year.

Interactive stories

A Sunday social media habit turned into a learning tool. Explore word forms, transitions, and pronunciations through engaging content.

Exercises & Tests

Challenge yourself with targeted exercises to test your vocabulary and your speaking confidence. Coming later this year.

Pricing

Basic

Limited functionality

All supported

Free

Pro

Full functionality

Ad free

€4.49/mo

Billed annually at €53 or €7.45/mo

FAQ

What are stories?

Stories are short, engaging pieces of content drawn from social media and curated sources that help you learn vocabulary in real-world context.

What are sources?

Don't view active content as Kasti uses real content from social media stories, written for social media stories.

Can I add my own words?

Yes. You can add any word you encounter outside the app and Kasti will add it to your vocabulary library instantly.

How does Kasti spaced repetition work?

Kasti uses an SM-2 based algorithm adapted for contextual learning, surfacing words at the optimal interval for long-term retention.

What is the difference between Kasti and Quizlet?

Quizlet is flashcard-first. Kasti is context-first — vocabulary is learned through real content, not isolated card drills.

What is the difference between Kasti and Anki?

Anki is a powerful tool but requires manual setup. Kasti automates content sourcing, card creation, and scheduling so you can focus on learning.

Can Kasti replace a language course?

Kasti is a vocabulary complement, not a full language course. It excels at building active vocabulary alongside any structured learning method.