To develop an application on iOS platform you need to know about Objective C and Swift languages because nearly all applications on iPad and iPhone are written in them. If compared, Swift is more simple than Objective C. As a developer you can other create a native app or a hybrid app. You can develop an app and distribute it on App Store or iTunes. For that, all you need to do is first register yourself as a developer with Apple and pay a small membership fee for using development tools and listing your app on App Store.
iPad app prototypes can also be tested in iPad using its iOS simulator. The simulator helps developers finalize the layout and check the correctness of its latitude and longitude. iPad apps can also run on iPhone and iPod Touch.
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