The free app to learn 2,000+ Kanji and 6,000+ Vocabulary with smart SRS flashcards. Scan Japanese text with your camera, study from your lock screen, and master JLPT N5 to N1 — all with a scientifically-proven method.
Powered by science-backed Spaced Repetition System (SRS) and built for serious learners of Kanji, Vocabulary and Kana.
Interactive kanji and vocabulary flashcards with readings, meanings, radicals, and funny mnemonics to make every character stick.
Scientifically optimized spaced repetition intervals ensure you remember what you learn. Items you struggle with appear more often.
Learn Kanji, Vocabulary, and Kana — all organized by JLPT level for structured progression from beginner N5 to advanced N1.
Point your camera at any Japanese text — books, signs, menus, manga. Instantly scan and look up every kanji and word detected.
Learn Japanese passively from your lock screen. A new kanji or vocabulary word appears throughout the day — no need to open the app.
Review Japanese words right from your home screen. Tap any word on the widget to jump straight into the lesson.
Listen to native Japanese pronunciation for every word. Perfect your accent and listening skills simultaneously.
Your learning progress is safely encrypted and synced to the cloud. Switch devices without losing a single review.
From smart flashcards to OCR scanning and lock screen widgets — explore the features that make learning Japanese a joy.
Point your camera at any Japanese text. Instantly scan and create flashcards from books, signs, or manga.
Learn Japanese passively. A new kanji or vocabulary appears on your lock screen throughout the day.
Review words right from your home screen. Tap any word to jump into the lesson.
Pass proficiency tests after each lesson. Score 80+ to unlock the next level.
Master kanji stroke order with guided animations and hands-on practice for every character.
Study comfortably day or night with a carefully crafted dark theme.
Quiz yourself on kanji and vocabulary right from your home screen — no need to open the app.
Watch your vocabulary bloom in a beautiful zen garden. Every mastered word plants and grows.
Five simple steps to Japanese mastery.
Pick your JLPT level (N5–N1) or start with Kana. Content is organized into bite-sized lessons.
Learn Kanji and Vocabulary through interactive flashcards with readings, meanings, and mnemonics.
Complete proficiency tests after each lesson. Score 80/100 or higher to unlock the next lesson.
Smart algorithm schedules reviews at the perfect time — right before you forget.
Watch your items level up from Seed to Burned. Track stats and celebrate milestones.
2,000+ Kanji organized by JLPT level (N5–N1) with on’yomi, kun’yomi readings, meanings, radicals, and mnemonics.
2,000+ items6,000+ real-world Japanese words and phrases with native pronunciation. Contextual learning for practical JLPT preparation.
6,000+ itemsMaster Hiragana and Katakana — the foundation of the Japanese writing system with stroke-order practice.
96 itemsDeep-dive tutorials, real-world frameworks, and the methods that actually move the needle.
You learned all 46 hiragana in a week. Six months later, half are gone. Here’s the spaced repetition fix that makes kana permanent.
9 min read →Why N5 test-takers still fail at kana — and the 21-day fix that closes the gap before exam day.
8 min read →Six 5-minute sessions retain better than one 30-minute block. Here’s the science and the daily schedule.
7 min read →50 katakana words every learner misreads — plus 5 sound rules and 7 decoding tricks.
11 min read →How to come back after a missed week without quitting — the recovery protocol that works.
8 min read →5 signs you’ve crossed into SRS burnout — plus a diagnostic quiz and a reset routine.
9 min read →SRS (Spaced Repetition System) is a learning technique that optimizes review intervals based on how well you know each Kanji or Vocabulary item. Items you struggle with appear more often, while mastered items are shown less frequently. This is scientifically proven to maximize long-term memory retention — the most effective way to learn and remember thousands of kanji characters.
Free users get full access to all learning content — one new lesson per day. Each lesson covers Kanji, Vocabulary, and includes a proficiency test. You also get unlimited SRS reviews, home screen and lock screen widgets, OCR scanning, writing practice, and statistics. To unlock a new lesson, you can watch a short rewarded ad — but only when you choose to. We never interrupt your study with unwanted ads.
Point your camera at any Japanese text — books, signs, menus, manga, or handwritten notes. Kanjijo instantly recognizes the characters using on-device OCR technology and shows detailed flashcards for every word detected. You can save scanned words to your personal collection for later review. All processing happens on your device, so your data stays private.
Yes! Kanjijo offers both home screen and lock screen widgets for iOS. A new Kanji or Vocabulary word appears throughout the day, helping you learn Japanese passively without even opening the app. Tap the widget to instantly open the full flashcard with readings, meanings, and pronunciation.
Kanjijo teaches Kanji, Vocabulary, and Kana in a unified learning path with sequential unlocking. Unlike Anki, you don’t need to create decks yourself — everything is ready-made and organized by JLPT level. Unlike WaniKani, Kanjijo includes vocabulary, pronunciation, writing practice, and OCR scanning — all for free. Each card includes funny mnemonics, radical breakdowns, and native pronunciation. You must pass proficiency tests before advancing, ensuring true mastery.
Kanjijo covers all five JLPT levels: N5 (beginner), N4, N3, N2, and N1 (advanced). You get 2,000+ Kanji and 6,000+ Vocabulary items organized in sequential lessons. Start from zero or jump to your current level.
Absolutely. You can cancel your subscription at any time through the App Store. You will continue to have access until the end of your billing period. There are no cancellation fees or hidden charges.
Yes. Your data is encrypted both on your device and in the cloud using industry-standard AES-256 encryption. OCR scanning is processed entirely on-device. We never sell or share your personal data with third parties.
Join thousands of learners mastering Kanji and Vocabulary with Kanjijo. Free to download on iOS, coming soon to Android.