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It is a universally recognized best practice to visibly expose your iOS application’s version number somewhere on the screen. Often times you will see it on the application’s splash screen or can get to it by selecting the About menu item (assuming the application has a menu). No matter where it’s location (I have my preference as to where it should be, which I will describe momentarily), it’s a good idea to have it easily viewed by both your beta testers and your users.

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