Apple on Wednesday informed iOS developers that beginning April 30, 2020, all iPhone and iPad apps submitted to the App Store must be built using the iOS 13 or iPadOS 13 SDK or later.
Apple had previously warned developers that April would be the month they would begin enforcing the built with iOS 13 requirement but hadn’t announced a specific date.
From the Apple Developer website:
iOS 13 is now running on 77% of all iOS devices introduced in the last four years, worldwide. Deliver great user experiences by seamlessly integrating with Dark Mode, Sign in with Apple, and the latest advances in ARKit 3, Core ML 3, and Siri. Starting April 30, 2020, all iPhone apps submitted to the App Store must be built with the iOS 13 SDK or later.
Take advantage of Xcode features such as storyboards (including launch storyboards), Auto Layout, and SwiftUI, to ensure your app’s interface elements and layouts automatically fit the display of all iPhone models, regardless of size or aspect ratio. Starting April 30, 2020, all apps submitted to the App Store must use an Xcode storyboard to provide the app’s launch screen and all iPhone apps must support all iPhone screens.
As mentioned above, developers are also required to use an Xcode storyboard to provide an app’s launch screen. All iPhone apps must support all size iPhone screens and all iPad apps are required to support all size iPad screens.