If you mean "earned app", it's not clear what exactly you mean. There are different types of apps that can generate earnings, such as mobile games, e-commerce apps, subscription-based services, or apps with in-app ads.
If you are interested in creating an app with the potential to generate income, here are some steps you can consider:
Identify your app's purpose: Identify the specific problem your app will solve or the value it will provide to users.
Research your target audience: Understand the needs, preferences and demographics of your target users. This will help you customize your app's features and monetization strategy.
Choose your monetization model: Explore different monetization methods, such as in-app purchases, advertising, subscriptions, or selling digital goods. Choose an approach that suits the nature of your application and target audience.
Develop your application: Use the application development platform, programming languages and frameworks to build your application. Popular options include Android Studio for Android apps, Xcode for iOS apps, or cross-platform frameworks like React Native or Flutter.
Implement monetization strategies: Integrate selected monetization methods into your app. For example, if you opt for in-app advertising, integrate the ad network SDK. If you plan to make in-app purchases, set up the necessary payment gateways.
Test and optimize: Thoroughly test your application to ensure a smooth user experience and to fix any bugs or issues. Continuously collect user feedback and make improvements based on their suggestions.
Publish and sell your app: Submit your app to relevant app stores such as the Apple App Store or Google Play Store. Create a marketing strategy to increase the app's visibility and attract users.
Remember that app monetization can be complicated and success is not guaranteed. It requires careful planning, user-centered design and effective marketing strategies. In addition, legal and ethical considerations such as compliance with app store guidelines and respect for user privacy are essential.
If you have more specific questions or need more help, don't hesitate to ask!