Kotrin-Learn Japanese

Learn Japanese: All-in-one

Free · In‑App Purchases · Designed for iPad

Master Japanese with the all-in-one app that personalizes for you. 5,000+ lessons, real-world dialogues, and AI tutor. Start your Japanese learning journey today! Stop switching between apps to learn Japanese. Meet the first all-in-one platform designed to take you from beginner to fluent through a truly personalized experience. Whether you're mastering your first Hiragana or preparing for N1 test, our AI-powered engine builds the perfect curriculum for your goals. Most apps focus on just one skill. We focus on all of them. Our unique "Language Embedding" technology analyzes your proficiency and interests across 1,500+ parameters to ensure every lesson feels relevant, engaging, and exactly at your level. The Complete Japanese Suite: One app for everything. Master Speaking, Reading, Writing, and Listening in a single, unified workflow. Massive Lesson Library: Access 5,000+ in-depth lessons covering "Can-Do" real-life scenarios, essential grammar, and core vocabulary. 24/7 Personal AI Tutor: Stuck on a sentence? Ask your AI Sensei. Fine-tuned by Japanese linguistics experts, your tutor provides instant explanations and custom practice cards. Interactive Kanji Writing: Don't just look at characters—write them. Our custom handwriting widget guides you through Hiragana, Katakana, and all 2,136 Joyo Kanji. Real-World Audio: Skip the "textbook" robot voices. Listen to natural dialogues and scenarios to master the rhythm, slang, and intonation of native speakers. Smart Accuracy Quizzes: Sharpen your skills with AI-driven quizzes that identify your weak spots and help you fix them through active recall. Stay Motivated: Track your daily growth with streaks and progress boards designed to turn language learning into a rewarding daily habit. By using advanced language profile embeddings, we don’t just give you a course; we give you a path. The app evolves as you do, matching your interests—whether it’s business, travel, or culture—with the right content at the right time. Start your Japanese journey today. All-in-one. All for you. Terms of Use: https://kotrin.jp/terms Privacy: https://kotrin.jp/privacy Support/Contact: https://kotrin.jp/contact

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Open your world to Japanese. Fluency is built in the details. We’re constantly refining our platform to make your learning experience as smooth as a real conversation. Dive in and keep your momentum going. In this update, we’ve polished the search experience. Searching lessons and contents are now smoother and more responsive, allowing you to stay fully immersed in the rhythm of the language.

Version 1.0.14

The developer, Blue Commons Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Contact Info
    • User Content

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • Blue Commons Inc.
  • Size
    • 63.6 MB
  • Category
    • Education
  • Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPad
      Requires iPadOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
  • Languages
    • English
  • Age Rating
    4+
  • In-App Purchases
    Yes
  • Copyright
    • © 2026 Kotrin Inc.
  • Developer Website
  • Privacy Policy