Haya-Ben

Haya-Ben is a multilingual vocabulary learning app, optimized for English, Japanese, and Vietnamese, including Eiken-style word decks. Learn efficiently in spare moments with flashcards and spaced repetition. Key Features - Preset Eiken-level vocabulary decks (Grade 5 and up) - Flashcards and spaced repetition to lock in memory - Automatic tracking of progress and mastery - Pronunciation playback (text-to-speech) - Create your own custom decks - Import / export decks via CSV - Trilingual UI: English, Japanese, Vietnamese AI Word Generation (optional, parent-managed) Enter a topic and AI generates related vocabulary. You use your own OpenAI / Anthropic API key. Disabled for users under 13; parental verification required for users aged 13–17. Privacy-first Design - No account required. Learning data stays on your device. - Designed for ages 9+, with care for children's privacy. - Ads are non-personalized (contextual) only. Build your vocabulary steadily, one day at a time. Start learning with Haya-Ben today.