Apple Unveils iOS 13 App Requirements

All apps are required to be updated or built to work with iOS 13.

Recently, Apple announced that all apps are required to be updated or built to work with iOS 13 by April 2020.
Also, now, apps will be required to fit the all-screen designs of Apple’s largest mobile devices and iPads.
"Customers around the world will soon experience the incredible new features of iOS 13. Make sure your apps are faster, more responsive, and more engaging by taking advantage of Dark Mode and advances in ARKit 3, Core ML 3, and Siri. Update your apps and product pages, and submit today," wrote Apple.
The company also advocates using the XCode 11 GM seed rather than XCode 11. XCode 11 had experience lookup failures when the app ran on iOS 11 or earlier. XCode 11 GM seed comprises SDKs for iOS 13, iPadOS, watchOS, tvOS 12 and macOS Catalina.
Apple also prompted to use TestFlight to test apps on a device before submitting them for review.
Apple said that developers should make sure they are making the most of the product pages with the app’s name, icon, description, screenshots, previews, and keywords; before submitting apps for review.