Master Japanese, One by One.
Obo uses a scientifically-proven Spaced Repetition System — helping you remember Japanese vocabulary longer, with less effort.
Ever Experienced This?
Learning Japanese shouldn't feel like an uphill battle.
Learn today, forget tomorrow
You spend hours studying Japanese characters, but by next week it's all gone.
Motivation fades fast
You start with energy, but without seeing progress, you give up within weeks.
Don't know where to start
Hiragana? Katakana? Kanji? 2000+ characters feel overwhelming.
Other apps are too complicated
Powerful tools exist, but they're intimidating for beginners.
You're not alone. And the problem isn't you — it's the learning method. There's a better way.
There's a Better Way
Obo uses Spaced Repetition System (SRS) — the same method used by polyglots and memory champions worldwide.
Instead of cramming, our smart algorithm schedules reviews at the perfect moment — right before you're about to forget. This means you remember more, study less, and actually see progress.
The Result?
Remember longer. Learn faster.
How SRS Works
Difficult cards
Appear more often
Mastered cards
Appear less frequently
Perfect timing
Review right before forgetting
Memory Retention Over Time
Everything You Need to Master Japanese
From smart creation to long-term retention, we've rebuilt the flashcard experience.
Remember Longer
Smart algorithm that knows exactly when you need to review, so you never forget what you've learned.
Start from Zero
Complete Hiragana & Katakana courses with practice exercises. Perfect for absolute beginners.
Your Way, Your Pace
Create custom decks or import from Anki. Study exactly what you need, when you need it.
AI-Powered Creation
Just type a topic, and AI generates complete flashcards with readings and examples.
Test Yourself
Interactive quiz mode with instant feedback to reinforce your learning.
Learn Anywhere
Offline-first architecture means you can study on the train, plane, or anywhere without internet.
How It Works
Three simple steps to Japanese fluency.
Bring Your Decks
Import your existing Anki .apkg files or create new cards manually. Your entire Japanese library, moved to a better home.
Study Smart
Our SRS algorithm shows you cards at the perfect moment — right before you forget. No more wasted reviews.
Master Japanese
Watch your vocabulary grow. Track progress with beautiful stats. Actually see yourself improving.
We're building the future of Japanese learning
Obo is in active development. We rollout new features every week to ensure you have the best tools to master Japanese.
Solidify your learning foundation with core features.
Stay connected and immerse yourself in Japanese.
Harness AI to accelerate your path to fluency.
Optimize your study sessions with better control.
Secure and personalized access for everyone.
Master Kanji with deep insights and components.
Want to suggest a feature?
Our development is driven by our users. Reach out and help us shape the future of Obo.
Free to get started.
Obo is currently 100% FREE for all users. Start your Japanese journey today with zero hurdles.
We're an indie developer passionate about making Japanese learning accessible. Your support through downloads and sharing the app means more than any subscription revenue ever could.
Ready to Master Japanese, One by One?
Be among the first thousand learners and get special early-adopter benefits. Get started for free today.
Available on iOS • Android version coming soon