🌍 HAYA-BEN — SMART MULTILINGUAL VOCABULARY LEARNING
Haya-Ben is a multilingual vocabulary learning app that allows users to create and practice vocabulary decks for many different language pairs. The app is optimized for English, Japanese, and Vietnamese, while also allowing users to create custom vocabulary decks for other languages. Learning is supported through flashcards, spaced repetition, and an optional AI-powered vocabulary generation feature.
⭐ KEY FEATURES
🌐 Multilingual vocabulary learning: optimized for 日本語 ↔ English ↔ Tiếng Việt, while also supporting many other language pairs.
• Create decks for any language pair (JP-VI, JP-EN, EN-VI...)
• Freely reverse your study direction: see the source word → guess the meaning, or the other way around
• Ideal for bilingual learners, international students, and professionals working in multilingual environments
📚 Built-in JLPT decks from N5 to N1
• Over 5,000 Japanese vocabulary words selected from JMdict and JLPT materials
• Clearly organized by level from N5 to N1
• Includes Hiragana, Katakana, Kanji, and Furigana readings
🤖 AI Factory — Generate vocabulary by topic
• Enter any topic, such as “office,” “travel,” “food,” or “technology”
• AI automatically generates vocabulary decks suitable for multiple languages at once
• Supports leading AI providers: OpenAI (GPT-4o) and Anthropic (Claude)
• BYOK philosophy — Bring Your Own Key: you manage your own API key, with no intermediary server
🎴 Fast-reflex flashcards
• Reflex-style flashcard mode helps your brain remember more effectively
• Self-rate your mastery: Weak / Medium / Good / Perfect
• Automatically prioritizes words you have not mastered in the next review session
• Reverse src ↔ tgt to study in both directions
🔊 Native-like pronunciation (TTS)
• Hear each word read aloud with natural pronunciation
• Customize speech speed and pitch
• Uses Google TTS for high-quality voice output
📊 Visual progress tracking
• Mastery circle shows the memorization percentage for each deck
• Detailed study history
• Mark favorite decks to prioritize review
📂 Flexible CSV import/export
• Import vocabulary lists from CSV files
• Export decks to share with friends or create backups
• Standard format compatible with spreadsheet apps
🌏 Multilingual interface
• Supports Japanese (日本語), Vietnamese, and English interfaces
• Automatically detects your device system language
🔒 SECURITY AND PRIVACY
Haya-Ben is designed with a “local-first” philosophy:
• All learning data is stored on your device
• No central server collects personal learning data
• API keys (OpenAI/Anthropic) are protected using your device’s secure storage
• No account registration or email address required
• Does not collect the Android Advertising ID (AAID)
👨👩👧 SUITABLE FOR AGES 9+
Haya-Ben is designed in line with Google Play’s “Designed for Families” policy and complies with COPPA (United States) and GDPR-K (EU). All ads are contextual and non-personalized, and the app does not collect the Android Advertising ID (AAID).
🎯 WHO IS HAYA-BEN FOR?
✓ Students preparing for JLPT, TOEIC, or IELTS
✓ International students preparing to study in Japan or the United States, and foreigners learning Vietnamese
✓ People who want to learn other languages
✓ Professionals working in multilingual environments
✓ Parents who want to study vocabulary together with their children from elementary school age
✓ Language lovers who want to expand their vocabulary every day
✓ Self-learners who do not want to create an account
📱 SYSTEM REQUIREMENTS
• Android 7.0 or later
• Google TTS is recommended for accurate pronunciation across languages
• Optional: OpenAI / Anthropic account to use AI Factory
📧 CONTACT
Support email: app-support@furucrm.com
Website: https://mobile.furucrm.com
Privacy Policy: https://mobile.furucrm.com/haya-ben/privacy-policy.html
Happy learning!