What is the difference between responsive design and adaptive design in the specific context of building a Flutter app that genuinely needs to properly work well across phones, tablets, and desktop screens?

Responsive design means your layout genuinely and fluidly adjusts itself continuously based on the exact currently available screen size, such as a grid that automatically adds an additional column as the screen genuinely grows wider, while adaptive design means providing genuinely distinct, separate layout implementations specifically tailored for different device categories, such as a completely separate dedicated tablet layout compared to a distinctly different phone layout, and many genuinely well designed Flutter apps actually properly combine both of these particular approaches together, using responsive techniques for smaller continuous adjustments while using adaptive techniques for genuinely larger structural layout differences.

LayoutBuilder(
  builder: (context, constraints) {
    return constraints.maxWidth > 600 ? TabletLayout() : PhoneLayout();
  },
)