The document discusses native mobile app development. It explains that native apps are developed specifically for the targeted device's platform using its dedicated language. For iOS, the native language is Swift, which was designed to work with Apple's frameworks, making it easier to distribute apps on the App Store. For Android, the native language is Java, which works with Google's Android API and also simplifies distribution on the Google Play Store. While apps used to need to be built separately for each platform, there are now tools that can convert code into apps for both iOS and Android.
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