Why Adaptive and Responsive UI Matters

When we code our Flutter application on a specific class of devices, like smartphones, it is customary to design the user interface (UI) based on that particular class. So what happens when our tailored application runs on another type of device?

For instance, consider the following cases:

• Users want to download the application on a tablet.
• We want to release a desktop version of the application.
• Our client asks us to make a web version of the application.

Is the design still valid?