# Obo \| One By One — Master Japanese, One by One.

> AI-powered Japanese language learning app with spaced repetition and custom decks. (iPhone/iPad app by Luthfi Misbachul Munir.)

- Source: https://appshunter.io/ios/app/obo-one-by-one/id6758606356 (this page in markdown: same URL + `.md`)
- Developer: [Luthfi Misbachul Munir](https://appshunter.io/developer/1745283652)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 42 MB
- Languages: American English, Indonesian
- Released: 2026-02-13
- Data updated: 2026-08-18
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/obo-one-by-one/id6758606356/reviews.md

## What is Obo | One By One?

Master Japanese with ObO - Your Personal Language Learning Companion

ObO makes learning Japanese simple, effective, and enjoyable. Whether you're preparing for JLPT, planning a trip to Japan, or just starting your language journey, ObO adapts to your learning style.

KEY FEATURES:
• Smart Spaced Repetition (FSRS v5)
  - Learn efficiently with scientifically-proven algorithms
  - Cards appear exactly when you need to review them
  - Track your progress with detailed analytics

• AI-Powered Smart Add
  - Generate flashcards instantly with AI
  - Enter words or describe topics in your own language
  - Save time creating study materials

•  Perfect for Beginners
  - Step-by-step Hiragana & Katakana guide
  - Interactive kana practice with immediate feedback
  - Beginner-friendly onboarding walks you through everything

• Flexible Study Options
  - Ready-made template decks (JLPT N5-N3)
  - Import your Anki decks
  - Create custom decks for any topic
  - Grammar, vocabulary, kanji - all in one place

• Beautiful & Intuitive
  - Clean, distraction-free interface
  - Dark mode support
  - Smooth animations
  - Designed for daily study habits

• Premium Features
  - AI Smart Add with generous free quota
  - Premium decks curated by experts
  - Priority support
  - Unlock unlimited potential

LEARNING PATHS:

For JLPT Students:
Complete decks from N5 to N1 with thousands of essential words and grammar points.

For Travelers:
Quick study packs with practical phrases for dining, transportation, shopping, and emergencies.

For Anime/Manga Fans:
Learn the Japanese you hear in your favorite shows and read manga in the original language.

For Serious Learners:
Advanced customization, grammar analysis, and comprehensive study tracking.

WHY OBO?
• Offline-first: Study anywhere, anytime
• No ads interrupting your learning
• Privacy-focused: Your data stays yours
• Regular updates with new features
• Responsive support team

Start your Japanese learning journey with ObO today. Whether you're studying 10 minutes a day or several hours, ObO helps you make consistent progress toward fluency.

Download now and get started for free!

## Key features

- Smart Spaced Repetition (FSRS v5)
- AI-Powered Smart Add for flashcards
- Hiragana & Katakana guide
- JLPT N5-N1 template decks
- Anki deck import
- Offline study support
- Dark mode

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Premium N5 Deck | $3.99 | one-time |
| Premium N4 Deck | $2.99 | one-time |
| Starter AI Coins | $1.99 | one-time |
| Pro AI Coins | $2.99 | one-time |
| Ultimate AI Coins | $4.99 | one-time |
| Premium N3 Deck | $9.99 | one-time |



## Frequently asked questions about Obo | One By One

### What is Obo's learning methodology?

Obo utilizes Smart Spaced Repetition (FSRS v5), a scientifically-proven algorithm, to optimize learning. Cards appear for review precisely when you need them, ensuring efficient memorization and retention of Japanese vocabulary, grammar, and kanji.

### How does Obo help with JLPT preparation?

Obo offers ready-made template decks specifically designed for JLPT levels N5 through N1. These decks cover thousands of essential words and grammar points, providing a structured path for students aiming to pass the Japanese Language Proficiency Test.

### Can I import my existing study materials into Obo?

Yes, Obo allows you to import your Anki decks, making it easy to transition your existing study materials. You can also create custom decks for any topic, offering great flexibility for personalized learning.

### Does Obo offer offline study capabilities?

Absolutely. Obo is designed with an offline-first approach, allowing you to study Japanese anytime, anywhere without an internet connection. This makes it ideal for learning on the go.

### What are the premium features in Obo?

Premium features in Obo include an expanded AI Smart Add quota, access to premium decks curated by experts, and priority support. These features aim to unlock unlimited potential for serious learners.

### How often is Obo updated?

Obo receives regular updates, ensuring new features are consistently added and the app remains reliable. The latest version, 1.6.7, was last updated on June 22, 2026.

### Is Obo suitable for absolute beginners?

Yes, Obo is perfect for beginners, featuring a step-by-step Hiragana & Katakana guide with interactive practice and immediate feedback. The beginner-friendly onboarding process ensures a smooth start to your Japanese learning journey.

### Does Obo have ads?

No, Obo is ad-free, meaning no advertisements will interrupt your learning sessions. This provides a clean, distraction-free interface designed for daily study habits.

## Version history (last 5 releases)

### 1.6.10 — 2026-08-14

Fixed staggering and lagging bug

### 1.6.9 — 2026-07-31

• Announcements now appear only after you’re signed in and finished onboarding
• Offline Indonesian meanings for kanji lookup
• Paid deck titles update correctly when you switch language
• Bug fixes and polish for a smoother study experience

### 1.6.8 — 2026-07-07

Look up Japanese words anywhere.
• Share Japanese text from any app to Obo and instantly look up words (Yomitan-style), powered by an offline JMdict dictionary.
• Indonesian meanings — see definitions in Bahasa Indonesia, not just English.
• Save with AI — tap to add a word to any deck and Obo's AI builds a complete flashcard: reading, meaning, and a natural example sentence (1 coin).

Plus stability and performance improvements.

### 1.6.7 — 2026-06-22

Look up Japanese words anywhere.
• Share Japanese text from any app to Obo and instantly look up words (Yomitan-style), powered by an offline JMdict dictionary.
• Indonesian meanings — see definitions in Bahasa Indonesia, not just English.
• Save with AI — tap to add a word to any deck and Obo's AI builds a complete flashcard: reading, meaning, and a natural example sentence (1 coin).

Plus stability and performance improvements.

### 1.6.6 — 2026-06-07

Look up Japanese words anywhere.
• Share Japanese text from any app to Obo and instantly look up words (Yomitan-style), powered by an offline JMdict dictionary.
• Indonesian meanings — see definitions in Bahasa Indonesia, not just English.
• Save with AI — tap to add a word to any deck and Obo's AI builds a complete flashcard: reading, meaning, and a natural example sentence (1 coin).

Plus stability and performance improvements.

## More apps by Luthfi Misbachul Munir

- [Memorify Scanner](https://appshunter.io/ios/app/memorify-scanner/id6739183939)
- [Nihon Go \| 日本語](https://appshunter.io/ios/app/nihon-go/id6757104509)
- [Thermal Status](https://appshunter.io/ios/app/thermal-status/id6760938506)

All apps by Luthfi Misbachul Munir: https://appshunter.io/developer/1745283652

## Related topics

[obo](https://appshunter.io/ios/topics/obo)

---

*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 2026-08-18.*