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Cross-platform app development allows developers to create applications that run on multiple operating systems (OS) like iOS and Android, using a single codebase. This approach saves time and resources compared to building separate apps for each platform.
Key Aspects of Cross-Platform Development:

Single Codebase:
A major benefit is the ability to reuse the same code for different platforms, reducing development time and costs.
Frameworks:
Cross-platform development relies on frameworks that enable a single codebase to be adapted for different OS environments.
Performance:
While cross-platform apps can offer a native-like look and feel, they may not always achieve the same peak performance as native apps.
Hybrid vs. Native:
Cross-platform apps can be categorized as hybrid or near-native. Hybrid apps leverage web technologies (HTML, CSS, JavaScript), while near-native apps use platform-specific SDKs and libraries for a more native-like experience.
Examples:
Popular cross-platform frameworks include React Native, Flutter, Xamarin, Ionic, and NativeScript.
Advantages of Cross-Platform Development:
Faster Development: Reusing code across platforms accelerates the development process.
Cost-Effective: Reduced development time and resource allocation translate to lower costs.
Scalability: Cross-platform apps can be more easily adapted to different screen sizes and resolutions.
Consistent User Experience: Frameworks can help ensure a consistent user experience across different devices and platforms.
When to choose cross-platform development:
When you need to build apps for both iOS and Android platforms.
When you want to optimize development time and resources.
When you want to maintain a single codebase for the app logic while keeping control over UI elements.