Auto SMS Messenger 📱

An Android app that automatically sends custom SMS messages at a user-defined time, repeating daily. Built using Kotlin with Android Studio and WorkManager.

🚀 Features

• Schedule SMS to be sent at any chosen time
• Automatically repeats daily
• NEW: AI-Generated Messages using ChatGPT API
• Modern WorkManager-based scheduling
• Persists across device reboots
• Contact picker integration
• Material Design 3 UI
• Built using Kotlin DSL (build.gradle.kts)

🤖 AI Message Generation

The app now supports AI-generated messages using OpenAI's ChatGPT API:

• Message Styles: Friendly, Professional, Funny, Romantic
• Context-Aware: Provide context for more personalized messages
• Dynamic Generation: Each SMS gets a unique AI-generated message
• Fallback Support: Falls back to custom messages if API is unavailable
• Easy Setup: Configure your OpenAI API key in Settings

How to Use AI Messages:

1. Go to Settings → Configure your OpenAI API key
2. Create a new SMS schedule
3. Select "AI Generated" message type
4. Choose your preferred message style
5. Optionally provide context for personalization
6. The app will generate a unique message each time the SMS is sent

🛠 Tech Stack

• Kotlin
• WorkManager
• Room Database
• ViewModel & LiveData
• RecyclerView with DiffUtil
• Material Design 3
• ViewBinding
• Retrofit & OkHttp (for ChatGPT API)
• OpenAI GPT-3.5-turbo (for message generation)

⚠️ Permissions Required

• SEND_SMS
• POST_NOTIFICATIONS (Android 13+)
• RECEIVE_BOOT_COMPLETED (optional if reboot rescheduling is added)
• INTERNET (for ChatGPT API calls)

🧪 Testing

1. Run on a real device (emulators cannot send SMS).
2. Select time via TimePicker
3. Enter phone number & message
4. Tap "Schedule"
5. Wait for SMS and notification

📦 Build Instructions

1. Open in Android Studio
2. Allow all permissions
3. Connect physical Android device
4. Run the app

🛡 Disclaimer

This app sends SMS messages. Be mindful of carrier fees, user privacy, and abuse prevention.

📝 License

MIT License