Topic summary
UWP app

Extracted from the Wikipedia article Universal Windows Platform apps.
Look and feel
UWP apps are designed by individuals or software companies which leads to apps having their own look and feel. However, UWP apps built specifically for Windows 10 and 11 typically appear and function differently than ones on older versions, as they use new UI controls that look different from those of previous versions of Windows. The exception to this are apps that use custom UI, which is especially the case with video games. Apps designed for Windows 8.x look significantly different from those designed for Windows 10 and 11.