# HiWord.AI

> AI-powered English vocabulary learning app with spaced repetition, pronunciation coaching, and contextual reading.

## What is HiWord.AI?

HiWord.AI is a free English vocabulary learning platform that combines:
- **Chrome Extension**: Look up and save words while browsing any website
- **Web App (PWA)**: Review vocabulary with SRS (Spaced Repetition System), practice pronunciation with AI scoring, read AI-generated stories
- **Cloud Sync**: Progress syncs across all devices

## Key Features

### 1. Contextual Learning
- Highlight any word on a webpage to get instant translation and save it
- Words are captured with context (the sentence where you found them)
- Learn vocabulary from real content you're already reading

### 2. Spaced Repetition (SRS)
- Scientifically-proven memory algorithm
- Automatic scheduling of reviews
- Visual progress tracking (new → learning → young → mature → mastered)

### 3. AI Pronunciation Coach ("Shadow")
- Read sentences aloud and get AI-scored feedback
- Phoneme-level accuracy analysis
- Practice conversations with AI characters

### 4. AI Reading
- AI generates short stories using your vocabulary words
- Multiple difficulty levels and genres
- Inline word lookup while reading

### 5. Smart Dictionary
- Definitions in English and Chinese
- Word roots and etymology
- Related words and synonyms
- Example sentences with translations

## Who is it for?

- English learners (intermediate to advanced)
- Professionals who read English content daily
- Students preparing for TOEFL, IELTS, GRE
- Anyone who wants to build vocabulary naturally while browsing

## How it compares

| Feature | HiWord.AI | Anki | Duolingo |
|---------|-----------|------|----------|
| Browser extension | ✅ | ❌ | ❌ |
| Contextual capture | ✅ | ❌ | ❌ |
| SRS algorithm | ✅ | ✅ | Limited |
| AI pronunciation | ✅ | ❌ | Limited |
| Free | ✅ | ✅ | Freemium |
| No card creation needed | ✅ | ❌ | ✅ |

## Technical Details

- **Type**: Progressive Web App (PWA) + Chrome Extension
- **Platforms**: Web (all browsers), Chrome/Edge/Brave extension, iOS/Android (PWA)
- **Pricing**: Free (core features), no ads
- **Languages**: UI in English and Chinese; vocabulary learning for English

## Links

- Website: https://hiword.ai
- Landing page: https://hiword.ai/landing.html
- Chrome Web Store: (coming soon)
- Documentation: https://hiword.ai/landing.html#faq

## Contact

- Email: hi@hiword.ai
- GitHub: https://github.com/nicekate

## Sample Use Cases

1. "I read tech blogs daily and want to improve my English vocabulary" → Install extension, highlight unfamiliar words, review in the app
2. "I need to prepare for TOEFL" → Use built-in TOEFL word list + SRS review
3. "I want to improve my pronunciation" → Use Shadow practice mode with AI scoring
4. "I forget words after looking them up" → The SRS system schedules reviews at optimal intervals