🌐 Langadu

Langadu is a modern language learning ecosystem developed by TrustorStudio. The first application in the series is LangaduEnglish, designed to help users learn English effectively through AI-powered voice reading, bilingual translation, word lookup, and smart flashcards.

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📱 App: LangaduEnglish

🎯 Objective

To build a modern, professional, and user-friendly language learning application featuring:

• AI voice reading with real-time word synchronization (karaoke-style)
• Convenient bilingual translation
• Tap-to-lookup for vocabulary
• Advanced flashcards (with meanings, examples, synonyms, antonyms)
• Clean and modern interface optimized for learning

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✨ Key Features

1. AI Karaoke Reading

• Plays AI voice (Amazon Polly or Flutter TTS) at slow and normal speeds (0.5x – 1.0x)
• Highlights words in sync with the voice using timestamps
• Yellow highlight while reading

2. Bilingual Translation

• Displays dual-language content
• Toggleable translation tab for better focus

3. Direct Word Lookup

• Tap on any word to see:
  • Definitions
  • Examples
  • Pronunciation via TTS
  • Synonyms and antonyms
• Save words to flashcard list

4. Advanced Flashcards

• Flashcard list for saved words
• Each word shows:
  • 5–6 most common meanings
  • 1–2 usage examples
  • 2–3 synonyms and antonyms
• Card flip animation
• Users can add their own notes/meanings/examples

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🎨 UI & UX Design

UI (User Interface)

• Color Scheme: Blue gradient (#1E3A8A → #60A5FA), yellow highlights (#FBBF24), white/light gray background (#E5E7EB)
• Font: "Poppins" – modern and highly readable
• Main Reading Screen:
  • Header with app name and reading title
  • Large text area with real-time highlighting
  • Playback controls: play/pause, speed slider, repeat
  • Translation tab (expand/collapse)
  • Word popup with shadow effect

UX (User Experience)

• Easy-to-reach controls
• Tap-to-lookup interaction
• Smooth animations (highlighting, popup, card flipping)
• Clean layout focused on effective learning

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🧠 Tech Stack

• Flutter (Dart) – Cross-platform support (iOS & Android)
• TTS (Text-to-Speech) – Amazon Polly or Flutter TTS with timestamp support
• Translation API – Google Translate or custom service
• DeepSeek API – Used to generate word definitions, examples, synonyms, antonyms
• Google Speech API – For user pronunciation feedback
• MobileBERT – For text parsing and keyword picking

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💵 Monetization

• Rewarded Ads: Watch 3 ads to unlock 1-day VIP access
• Subscription Plans:
  • $2/month
  • $5/year

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📂 Installation (Local Development)

# Clone the project
git clone https://github.com/trustorstudio/langadu.git
cd langadu

# Install dependencies
flutter pub get

# Run the app
flutter run