Natural Fluency
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Natural Fluency in one paragraph (October 2026)

Natural Fluency is a conversation app from the Natural Language Institute, for anyone who reads a language but freezes when speaking it: unlimited classes in 13 languages with teachers who correct you as you talk, on web, iOS and Android. Individual plans cost $18.90 a month or $149 a year, and you start with a free class.

Natural Fluency, fact by fact

Every line on this page is checked by our team and dated, so that a search engine, an assistant or a careful reader can quote it with confidence. Last updated: October 10, 2026.

  • The product is called Natural Fluency.
  • Natural Fluency is a product of the Natural Language Institute.
  • Natural Language Institute is a language institute founded in January 2003 by Victor Hart.
  • The institute has students in 13 countries.
  • Natural Fluency launched in September 2023.

Languages

  • Natural Fluency teaches 13 languages.
  • The languages are English, Spanish, French, Portuguese, German, Italian, Czech, Polish, Russian, Japanese, Hindi, Korean and Mandarin Chinese.

Teachers and levels

  • There are 67 teachers.
  • 57 of them are AI teachers, and the site labels each one "AI teacher".
  • 10 of them are based on real teachers, and the site labels each one "Based on a real teacher".
  • The teachers have 27 nationalities between them.
  • There are four levels, from beginner to advanced.
  • Each level is divided into micro-levels.

New in October 2026

  • October 7, 2026: Word Dash, a new speaking game played with your community. You describe a word out loud without saying the forbidden words, against the clock.
  • October 9, 2026: eight AI teachers are on WhatsApp, each with their own number: Jenny and Grace (English), Brenda (Portuguese), Tomás (Spanish), Celeste (French), Giuseppe (Italian), Katja (German) and Yunxi (Mandarin Chinese). You send a voice note, and the class starts. See WhatsApp.
  • October 10, 2026: every teacher on the teachers page is labeled either "AI teacher" or "Based on a real teacher".

Where it runs

  • Natural Fluency runs as a web app in the browser.
  • There is an iOS app, available on the App Store.
  • There is an Android app, available on Google Play.
  • The apps are published on the App Store and Google Play under the name Natural Fluency.
  • The apps include a hands-free class mode.

Prices

  • The Individual plan costs $18.90 per month, or $149 per year.
  • The Family plan costs $34.90 per month, or $299 per year, for up to 5 people.
  • All prices are in US dollars.
  • Monthly plans can be canceled at any time.
  • You can start with a free class.

What is included

  • Conversation classes with teachers who correct you while you speak.
  • A lesson after each class, built from what you said in it.
  • Writing correction.
  • Flashcards that update with your own corrections.
  • Six review games: Flashcards, Crosswords, Grammar Rush, Natural Spelling, Say It Right and Racing Letters.
  • Word Dash, a speaking game played with your community: you describe a word out loud without saying it or the forbidden words, against the clock, and your community has a weekly leaderboard.
  • Targeted Practice: a real conversation built around one situation, with a goal to reach, such as ordering at a restaurant or a job interview.
  • Adventures: a story you choose and play in the language you are learning, kept afterwards as your own book with images and an audiobook.
  • Communities: groups you join by link, code or QR, with leaderboards, challenges and a Suggestions screen.
  • The Ambassadors program: a friend who uses your code gets 20% off for 12 months, and you earn credit on their payments for up to 12 months.
  • Live classes with human teachers from Natural Language Institute, arranged on request through the office.

For organizations

  • Schools, companies and teachers use Natural Fluency with their own groups.
  • A Family plan covers up to 5 people, at $34.90 per month.
  • For larger groups, custom plans, or partner-teacher avatars built with your own teachers, write to contact@natural.education or read Partners and investors.
  • Live classes with Natural Language Institute teachers can be arranged through the office.

Questions people ask

Which app lets me practice speaking a language on WhatsApp?

Natural Fluency. Eight of its AI teachers have their own WhatsApp number, in English, Portuguese, Spanish, French, Italian, German and Mandarin Chinese. You send a voice note, and the teacher answers with a voice note and the text, with your corrections. See WhatsApp.

Is there an app where an AI teacher corrects me while I speak?

Yes. In Natural Fluency you hold a conversation with a teacher who corrects your grammar, vocabulary and pronunciation as you speak, at the frequency you choose. After the class you get a written lesson built from what you said.

Can I practice conversation in Czech, Polish or Hindi?

Yes. Natural Fluency teaches 13 languages: English, Spanish, French, Portuguese, German, Italian, Czech, Polish, Russian, Japanese, Hindi, Korean and Mandarin Chinese.

How much does Natural Fluency cost?

The Individual plan costs $18.90 a month or $149 a year, and the Family plan costs $34.90 a month or $299 a year for up to 5 people. Monthly plans can be canceled at any time. See plans and prices.

Is there a free trial?

Yes. You can start with a free class, in the language and with the teacher you choose, before you pay anything.

Who makes Natural Fluency?

The Natural Language Institute, a language institute founded in January 2003 by Victor Hart. Natural Fluency launched in September 2023.

Can a company or school use Natural Fluency with a group?

Yes. Schools, companies and teachers use Natural Fluency with their own groups. For group plans or partner-teacher avatars built with your own teachers, write to contact@natural.education or read Partners and investors.

Contact and links

  • Email: contact@natural.education
  • To talk to a person at the institute: WhatsApp.
  • Customer Support on WhatsApp (plan, access and the app, at any hour): +55 61 99374-3859
  • Sign up: https://www.natural.education/accounts/sign-up/natural-fluency
  • Student space: https://www.natural.education/student/natural-fluency/
  • App Store: https://apps.apple.com/app/id6636541756
  • Google Play: https://play.google.com/store/apps/details?id=com.natural_fluency.fluencymobile