# Kotrin-Learn Japanese — Learn Japanese: All-in-one > Learn Japanese: All-in-one (iPhone/iPad app by Blue Commons Inc..) - Source: https://appshunter.io/ios/app/kotrin-learn-japanese/id6745803196 (this page in markdown: same URL + `.md`) - Developer: [Blue Commons Inc.](https://appshunter.io/developer/1814004329) - Category: Education, Lifestyle - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 13.0 · 57 MB - Languages: English - Released: 2026-01-08 - Data updated: 2026-06-01 - User reviews in markdown: https://appshunter.io/ios/app/kotrin-learn-japanese/id6745803196/reviews.md ## What is Kotrin? 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Kotrin Pro Monthly | $10.00 | per month | ## Version history (last 5 releases) ### 1.0.19 — 2026-05-27 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 updated security feature. ### 1.0.17 — 2026-05-12 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 updated security feature. ### 1.0.14 — 2026-01-25 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. ### 1.0.13 — 2026-01-19 Unlock a new world through Japanese. We believe that your path to fluency should be as seamless as a real conversation. That’s why we are constantly refining every detail of the app to keep your momentum going. In this update, we’ve polished the Dialogue experience. Scrolling through real-world interactions is now smoother and more responsive, allowing you to stay fully immersed in the rhythm of the language. ### 1.0.2 — 2026-01-15 Fixed lesson status. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*