217K+ dictionary entries, SRS flashcards, camera OCR, and an AI tutor — all running offline on your device. No internet required.
The most comprehensive offline Japanese dictionary. Search in English, Japanese, or romaji with fuzzy matching. Detailed entries with readings, pitch accent, and thousands of example sentences.
Smart spaced repetition that adapts to your memory. Automatically schedules reviews at the optimal interval so you retain vocabulary long-term with minimal effort.
Point your camera at any Japanese text — signs, menus, manga, books — and get instant translations and definitions. Works entirely offline with no data sent to the cloud.
On-device AI that explains grammar in context, suggests natural corrections, breaks down sentence structure, and answers your questions — all without a single API call.
A custom keyboard with instant dictionary lookups built right in. Type or swipe in Japanese and tap any word for its definition — never leave your keyboard again.
Copy any Japanese text anywhere on your phone and Goshu automatically surfaces definitions, readings, and example sentences. Seamless, zero-effort learning.
See how kanji and vocabulary connect across Chinese, Korean, and Vietnamese. Discover cognates and shared etymology to unlock multiple languages at once.
Stay motivated with daily goals, streak tracking, and achievement badges. Consistent practice adds up fast — turn learning into a habit that sticks.
Seamlessly sync your flashcards, progress, and settings across devices via Google Drive. Pick up where you left off whether you're on your phone or tablet.
All plans include every feature. No hidden fees, no surprise upgrades.
Find any word instantly with fuzzy matching and romanization support
Comprehensive entries with readings, meanings, and example sentences
Track your learning journey with detailed statistics and streaks
Spaced repetition cards that adapt to your memory strength
On-device AI tutor powered by Gemma 4 — no internet required
Built-in Japanese keyboard with real-time translation and word breakdown — type in any app
Download Goshu and join thousands of learners mastering Japanese offline.