Itqualityassurance
I recommend designing at 360x640 for Android and 375x667 for iOS. Unless you want to showcase your design in a modern and trendy Device Mockup, for example, iPhone 11 Pro or Samsung Galaxy S10+, or your target userbase has a different screen size.
What screen size should I design for mobile app?
Design for desktop displays from 1024×768 through 1920×1080. Design for mobile displays from 360×640 through 414×896. Design for tablet displays from 601×962 through 1280×800.
What is UI size?
UI Scale is what enables users to enlarge aspects of the user interface like the text and graphics when they appear too small due to a resolution discrepancy. It will uniformly scale GUI objects to suit the screen resolution.
