Want to build a real AI-powered Android application that can potentially be monetized? In this complete guide, we'll show you how to combine Stitch AI, Antigravity, MCP, Flutter, Firebase, AI APIs, Google AdMob, and RevenueCat to create a modern AI content-generation application.
This isn't just another basic Flutter demo. The goal is to create a practical application with a real business model based on advertisements, subscriptions, and in-app purchases.
You'll also get the complete prompts used to design and develop the application, so you can copy them directly and customize them for your own project.
🚀 What We're Building
AI Creator is an AI-powered content creation application designed for creators, marketers, businesses, YouTubers, and social media users.
Users can enter a topic, select a content type, choose a tone and language, and let AI generate useful content within seconds.
What Is the AI Creator App?
AI Creator is designed as a mobile AI writing and content-generation platform. Instead of requiring users to open multiple applications to create different types of content, the app puts several AI writing tools inside one interface.
Users Can Generate:
- YouTube titles
- YouTube descriptions
- YouTube content ideas
- Instagram captions
- TikTok scripts
- Social media posts
- Blog content
- Marketing copy
- Email content
- Hashtags
- General AI writing
💰 How Can the Developer Monetize the App?
The application uses a freemium business model. Users can access basic functionality for free while premium features are offered through subscriptions or purchases.
Free Users
Free users can receive a limited number of AI generations every day. For example, the application could provide:
When the daily limit is reached, users could wait for the limit to reset, watch a rewarded advertisement to receive additional credits, or upgrade to the Pro plan.
Pro Users
- More AI generations
- No advertisements
- Premium templates
- Advanced AI models
- Long-form content generation
- Unlimited content history
- Advanced writing tools
- Priority generation
Potential Revenue Sources
- Google AdMob — advertising revenue
- Rewarded Ads — users watch advertisements for additional credits
- Monthly subscriptions
- Annual subscriptions
- Lifetime purchases
🛠️ Technology Stack
| Technology | Purpose |
|---|---|
| Flutter | Android mobile application |
| Dart | Application programming language |
| Stitch AI | UI/UX design |
| Antigravity | AI-assisted development |
| MCP | Tool and development integration |
| Firebase | Authentication, database and backend services |
| AI API | AI content generation |
| Google AdMob | Advertising monetization |
| RevenueCat | Subscriptions and purchases |
🎨 Step 1 — Design the App with Stitch AI
The first step is creating the complete user interface and user experience. Use Stitch AI to establish the visual design before asking Antigravity to implement the application.
The design should feel like a premium AI/SaaS product rather than a basic tutorial application.
Recommended Visual Style
- Premium modern AI/SaaS aesthetic
- Dark theme as the primary theme
- Near-black or dark navy backgrounds
- Neon green primary accent
- White and light-gray typography
- Subtle glow effects
- Rounded cards
- Clean spacing
- Modern typography
- Material 3 principles
- No unnecessary visual clutter
- No human faces
- Professional Google Play Store appearance
📋 Copy the Complete Stitch AI Prompt
Click the button below to copy the entire prompt without manually highlighting the text.
Design a premium, production-ready Android application called AI Creator. The app is an AI-powered content creation platform that helps users generate social media and marketing content. The business model is freemium: free users receive limited AI generations and advertisements, while Pro users get more generations, premium features and no advertisements. Use the uploaded thumbnail as visual inspiration, especially the premium dark UI, neon green accent, glowing elements, modern typography, rounded cards, and professional AI/SaaS aesthetic. Do NOT copy the thumbnail literally. Create an original, polished UI suitable for a real Google Play Store application. VISUAL DESIGN - Premium modern AI/SaaS aesthetic - Dark theme as the primary theme - Near-black/dark navy backgrounds - Neon green as the primary accent - White/light gray typography - Subtle green glow effects - Rounded cards approximately 18–24px radius - Clean spacing - Strong visual hierarchy - Minimal premium icons - Smooth micro-interactions - Material 3 principles - No human faces - No unnecessary visual clutter - Professional commercial application appearance Also design a complete Light Theme while keeping the same brand identity. APP NAME AI Creator Suggested tagline: "Create better content with AI." REQUIRED SCREENS 1. Splash Screen - AI Creator logo - Subtle animated AI/glow effect - Premium dark background 2. Onboarding Create three onboarding screens: - Create content faster - Generate powerful AI content - Save time and grow your audience 3. Authentication Create: - Login - Sign Up - Forgot Password - Google Sign-In 4. Home Dashboard Show: - Greeting - User avatar - Free AI generation usage - Remaining credits - Quick Generate button - Content generation categories - Recent creations - Upgrade to Pro card Categories: - YouTube - Instagram - TikTok - Blog - Marketing - Email - Social Caption - Hashtags 5. AI Generator Fields: - Content Type - Topic - Description - Tone - Language - Length - Optional keywords Tone options: - Professional - Friendly - Casual - Funny - Persuasive - Marketing - Educational Include a large premium "Generate with AI" button. 6. Generated Result Include: - Generated content - Copy - Share - Save - Regenerate - Edit 7. Recent Creations Include: - Search - Filter - Delete - Favorite - Open 8. Favorites Show saved/favorited content. 9. Templates Categories: - YouTube - Instagram - TikTok - Marketing - Business - Email - Blog Some templates can be marked PRO. 10. AI Creator Pro Show: AI CREATOR PRO Benefits: - More AI generations - Advanced AI models - No advertisements - Premium templates - Longer content generation - Unlimited history - Advanced writing tools - Priority generation Plans: - Monthly - Yearly - Lifetime Include: - Start Free Trial - Restore Purchases - Terms - Privacy Policy 11. Rewarded Ad / Extra Credits Show: "Need more generations?" Options: - Watch an ad → Earn additional AI credits - Upgrade to Pro 12. Profile Include: - Profile photo - Name - Email - Subscription status - Usage statistics 13. Settings Include: - Dark/Light/System theme - Language - Notifications - AI preferences - Manage subscription - Restore purchases - Privacy - Terms - Help & Support - About - Logout 14. Empty States Design polished states for: - No creations - No favorites - No search results - No internet connection 15. Error States Design: - AI generation failed - Network error - Authentication error - Server error - Rate limit reached UX REQUIREMENTS Include: - Loading skeletons - Button loading states - Disabled states - Form validation - Error messages - Success feedback - Confirmation dialogs - Smooth transitions - Pull-to-refresh where appropriate - Responsive layouts - Accessibility-friendly contrast - Touch-friendly controls Create reusable components and maintain consistent spacing, typography, buttons, cards, icons, and colors throughout the application. The final result should look like a real premium AI SaaS product that could be published on Google Play, not a basic tutorial/demo application.
🤖 Step 2 — Turn the Stitch Design Into a Flutter App
Once the UI is ready, the next step is to use Antigravity to turn the design into a functional application.
Tell Antigravity explicitly that the mobile application must be built using Flutter and Dart. Do not allow the development process to switch to native Android, Kotlin, Java, Jetpack Compose, or XML layouts.
📋 Antigravity Master Development Prompt
Build the complete AI Creator application as a production-ready Android app.
The uploaded thumbnail is the visual/product inspiration.
The Stitch AI designs are the UI/UX source of truth.
Follow the Stitch designs closely while improving usability where necessary.
CRITICAL TECHNOLOGY REQUIREMENT
USE FLUTTER FOR THE ENTIRE MOBILE APPLICATION.
The mobile frontend MUST be implemented with:
Flutter + Dart
Do NOT build the Android app using:
- Kotlin
- Jetpack Compose
- Java Android Views
- React Native
- Expo
- Ionic
- Native Android XML
The final application must be capable of being built as a production Android APK/AAB.
Use a clean Flutter architecture with reusable widgets, proper state management, routing, models, services, repositories, error handling, and environment configuration.
PRODUCT
App name: AI Creator
AI Creator allows users to generate high-quality content using AI.
Users can generate:
- YouTube titles
- YouTube descriptions
- YouTube ideas
- Instagram captions
- TikTok scripts
- Social media posts
- Blog content
- Marketing copy
- Emails
- Hashtags
- General AI writing
BUSINESS MODEL
The application must use a real freemium monetization model.
FREE USERS
Free users receive a limited number of AI generations.
Example:
5 generations per day.
When the limit is reached, users can:
1. Watch a rewarded advertisement to receive additional credits.
2. Upgrade to AI Creator Pro.
PRO USERS
Pro users receive expanded or unlimited usage depending on the subscription plan and should not see advertisements.
Support:
- Monthly subscription
- Annual subscription
- Lifetime purchase
Use RevenueCat for subscription management.
Use Google AdMob for advertisements.
Do NOT hardcode subscription status.
BACKEND
Use Firebase where appropriate:
- Firebase Authentication
- Cloud Firestore
- Firebase Cloud Functions
- Firebase Analytics
- Firebase Crashlytics
- Firebase Remote Config
Use Firebase Authentication for:
- Email/password
- Google Sign-In
- Logout
- Password reset
Store user data securely in Firestore.
AI ARCHITECTURE
Never expose a private AI API key directly inside the Flutter application.
Flutter should communicate with a secure backend endpoint.
Architecture:
Flutter → Firebase Authentication → Secure Cloud Function/backend → AI provider → Response → Flutter
Create an abstraction around the AI provider so the model/provider can be changed later.
Handle:
- Timeout
- Rate limit
- Invalid request
- AI provider error
- Network failure
- Empty response
FLUTTER ARCHITECTURE
Use a scalable structure such as:
lib/
core/
theme/
routing/
constants/
utils/
errors/
widgets/
features/
auth/
home/
generator/
history/
favorites/
templates/
subscription/
profile/
settings/
data/
models/
repositories/
services/
main.dart
Separate:
- UI
- State
- Business logic
- Data access
- External services
REQUIRED SCREENS
Implement all screens designed in Stitch:
1. Splash
2. Onboarding
3. Login
4. Register
5. Forgot Password
6. Home
7. AI Generator
8. Generated Result
9. History
10. Favorites
11. Templates
12. Pro Subscription
13. Rewarded Ad / Extra Credits
14. Profile
15. Settings
16. Help/Support
17. Empty states
18. Error states
USAGE SYSTEM
Create a proper usage/credit system.
Do not rely only on local storage.
Track usage server-side.
Prevent users from simply clearing app data to bypass generation limits.
The backend must validate the user's entitlement before processing limited AI requests.
ADS
Integrate Google AdMob.
Support:
- Banner advertisements where appropriate
- Rewarded advertisements for additional free credits
- Interstitial advertisements only where appropriate
Never show aggressive advertisements immediately after every action.
Pro users should not receive advertisements.
Use test ad IDs during development.
SUBSCRIPTIONS
Use RevenueCat.
Create:
- Free tier
- Monthly Pro
- Annual Pro
- Lifetime Pro
Implement:
- Purchase
- Restore purchases
- Subscription status
- Expiration handling
- Error handling
Never assume that a successful button tap means a purchase succeeded.
Verify the entitlement.
SECURITY
Implement:
- Firebase security rules
- Secure backend AI calls
- No secret API keys in Flutter source
- Input validation
- Authentication checks
- Server-side usage validation
- Secure user-specific Firestore queries
PRODUCTION QUALITY
The application must include:
- Proper loading states
- Skeleton loaders
- Error states
- Empty states
- Network handling
- Form validation
- Retry mechanisms
- Confirmation dialogs
- Success feedback
- Responsive layouts
- Dark mode
- Light mode
- System theme
- Keyboard handling
- Safe areas
- Android back navigation
- App lifecycle handling
DEVELOPMENT PROCESS
Work systematically:
1. Inspect the Stitch designs.
2. Create the Flutter project.
3. Establish architecture.
4. Establish theme/design system.
5. Implement navigation.
6. Implement authentication.
7. Implement Firebase.
8. Implement Home.
9. Implement generator.
10. Implement AI backend.
11. Implement history/favorites.
12. Implement templates.
13. Implement usage/credits.
14. Implement AdMob.
15. Implement RevenueCat.
16. Implement settings/profile.
17. Add analytics and Crashlytics.
18. Add error/empty/loading states.
19. Test all major flows.
20. Fix build errors.
21. Run Flutter analyzer.
22. Run Flutter tests.
23. Build release APK/AAB.
Do not stop after creating the UI.
The final result must be a functional Flutter application prepared for production deployment.
Whenever a third-party API requires credentials, create a secure configuration/environment mechanism and clearly identify what credentials need to be supplied.
Never put secret credentials directly into source code.
⚠️ Tell Antigravity to Use Flutter
If you're using Antigravity with an Android project, explicitly provide the following instruction before development begins.
IMPORTANT — IMPLEMENTATION RULE: This project is an Android Flutter application. You MUST use: Flutter + Dart for the entire mobile frontend. Do not switch to Kotlin, Java, Jetpack Compose, XML layouts, React Native, or any other mobile framework. The application UI and business logic must remain in Flutter/Dart. Use: - Flutter - Dart - Material 3 - Firebase Flutter SDKs - RevenueCat Flutter SDK - Google Mobile Ads Flutter SDK - Proper Flutter navigation - Proper Flutter state management - Reusable Flutter widgets The Android folder should only be used for Flutter's Android platform configuration and native integrations when absolutely required. The final application must be buildable using Flutter. Verify the project with: flutter analyze and build the production Android application using: flutter build appbundle --release Do not create a separate native Android implementation alongside Flutter. The goal is a production-quality Flutter Android app, not a prototype or static UI demonstration.
🔗 How All the Technologies Work Together
Stitch AI
↓
UI / UX Design
↓
Antigravity + MCP
↓
AI-Assisted Development
↓
Flutter + Dart
↓
Android Application
↓
Firebase
Authentication + Backend + Database
↓
AI API
Content Generation
↓
AdMob + RevenueCat
Advertising + Subscriptions
↓
Google Play
Publish and Monetize
🔐 Important Security Considerations
One of the most important parts of an AI application is protecting API credentials. Never place a private AI API key directly inside the Flutter application.
Because mobile applications can be reverse-engineered, sensitive credentials should be kept on a secure backend.
Recommended Architecture
The backend can also validate user authentication, subscription status, usage limits, and generation credits before processing requests.
📱 Why This Is a Good Project for Developers
This project combines several technologies that are increasingly useful in modern application development.
- Flutter mobile development
- Dart programming
- AI API integration
- Firebase backend development
- User authentication
- Cloud database
- AI usage limits
- Advertisement monetization
- Subscription monetization
- Production error handling
- Analytics
- Google Play deployment
🎯 Key Takeaways
- Use Stitch AI to establish the application's UI/UX before development.
- Use Antigravity to assist with implementation.
- Keep the mobile application entirely in Flutter and Dart.
- Use Firebase for authentication, backend services and data.
- Keep private AI API credentials on a secure backend.
- Use server-side validation for AI usage limits.
- Use AdMob for advertising and rewarded credits.
- Use RevenueCat to manage subscriptions and purchases.
- Test thoroughly before publishing the application.
- Never assume AI-generated code is production-ready without reviewing and testing it.
❓ Frequently Asked Questions
Can I really build this app with Flutter?
Yes. Flutter can be used to build the Android frontend while Firebase, secure backend services and third-party SDKs provide authentication, data storage, AI integration and monetization functionality.
Can Antigravity build the entire application automatically?
AI-assisted development can generate and modify a significant amount of application code, but you should still review, test and debug the project throughout development.
Should I put my AI API key inside Flutter?
No. A private AI API key should not be embedded directly into a production mobile application. Use a secure backend or cloud function to protect sensitive credentials.
Can I make money from this app?
The application can be designed with advertising, subscriptions and purchases, but revenue is never guaranteed. Earnings depend on factors such as users, retention, ad demand, subscription conversion, pricing, AI costs and operating expenses.
Can I use rewarded ads for extra AI generations?
Yes, rewarded advertisements can be used as part of a freemium model where users voluntarily watch an advertisement in exchange for an additional benefit, subject to the applicable advertising and platform policies.
Can I use RevenueCat for Android subscriptions?
Yes. RevenueCat can help manage subscription entitlements and purchases, while Google Play handles the underlying Android purchase system.
Can I publish the app on Google Play?
Yes, after completing development, testing, privacy requirements, billing configuration, content review, security checks and all applicable Google Play requirements.
🎥 Watch the Full Tutorial
Follow the complete video tutorial on ALL PC GEEK to see how the application is designed with Stitch AI and developed with Antigravity and Flutter.
The tutorial demonstrates the workflow step by step so you can follow along with the prompts provided in this article.
📌 Final Thoughts
AI-powered applications are becoming easier to develop as tools such as Stitch AI and Antigravity become more capable. Combining AI-assisted development with Flutter, Firebase and secure backend services gives developers a powerful workflow for creating modern mobile applications.
However, adding AI to an application is only one part of building a successful product. A useful application also needs a good user experience, reliable infrastructure, sensible AI costs, strong security, effective monetization and continuous improvement.
The prompts in this guide provide a strong starting point, but you should customize the application according to your target audience and business model.
Before publishing, thoroughly test authentication, AI generation, usage limits, advertisements, purchases, subscriptions, privacy controls and error handling.
🚀 Ready to Build?
Copy the prompts above, open Stitch AI and Antigravity, and start building your own AI-powered Flutter application.
Build it. Test it. Publish it. Monetize it.
ALL PC GEEK
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