About

About Nikki AI

Last updated 18 September 2026

What Nikki AI is

Nikki AI is a Japanese learning app that covers reading, listening, writing and speaking in one place, built around a daily journal that corrects what you write.

It teaches Japanese to English speakers. It covers the JLPT levels N5 to N1.

It runs on the web, on iOS and on Android. The same account works on all three.

The four skills

Most Japanese apps train one skill well and leave you to find the rest elsewhere. Nikki covers four, on the same material.

  • Reading. Guided story-lessons with a recurring cast. Tap any word for its reading and meaning.
  • Listening. Every line of dialogue is voiced.
  • Writing. You write about your day in Japanese. The app returns line-by-line corrections, a plain-English read-back, and a cleaner version to learn from.
  • Speaking. Speaking practice marks your pronunciation word by word. The recognition runs on your own device.

How the parts fit together

  • Story-lessons teach a grammar point in a scene, then practise it.
  • A grammar library holds every point the lessons teach, with examples and notes.
  • Flashcards review vocabulary and kanji on a spaced-repetition schedule, so a word returns just before you would forget it.
  • The journal is where you use all of it. Writing practice is the centre of the app, not an extra.
  • Ask answers a question from any screen, and you can keep the answer as a flashcard.

What it costs

Nikki AI is free to start. A subscription unlocks the full lesson catalogue and the feedback on your writing.

Prices are set per country. The pricing page shows the price in your own currency.

What you write stays yours. You can export your journal, and you can delete your account.

How it differs from other Japanese apps

Two things are unusual, and they are the honest reasons to choose it.

  • It corrects your own writing. Most apps ask you to recognise or arrange Japanese somebody else wrote. Nikki reads a sentence you composed and tells you what is wrong with it.
  • It covers all four skills in one app. The usual advice for learning Japanese is to combine several apps — one for kanji, one for grammar, one for speaking. Nikki is built so that you do not have to.

What it does not do

It is not a tutor and not a conversation partner. It does not connect you to a teacher or to other learners for live conversation.

It does not replace a class. It is built for daily independent practice between lessons, or instead of them if you study alone.

Common questions

Is Nikki AI free?

Nikki AI is free to start. A subscription unlocks the full lesson catalogue and the feedback on your writing. Prices are set per country.

What JLPT levels does Nikki AI cover?

N5 to N1. You can start from zero — the app begins with hiragana and katakana.

Can I learn Japanese with Nikki AI as a complete beginner?

Yes. The app starts with hiragana and katakana before any grammar, so it assumes no previous Japanese.

Does Nikki AI correct my Japanese writing?

Yes. You write a journal entry in Japanese and the app returns line-by-line corrections, a plain-English read-back of what you actually wrote, and a cleaner version of the same entry to learn from.

Does Nikki AI have speaking practice?

Yes. Speaking practice marks your pronunciation word by word, and the speech recognition runs on your own device rather than being uploaded.

Is there a Nikki AI app for iPhone and Android?

Yes. Nikki AI runs on the web, on iOS and on Android, and one account works on all three. The phone apps are in beta testing.

Getting started

Nikki AI is free to start. You can create an account on the web and use the same account on the phone apps.

Create an account · See the pricing