Foldables are here. They unfold. Then they fold again. But what’s so special about them? First and foremost, a display size change is something to care about and to adapt your app to. Also, folding and unfolding means that the phone can assume different postures, and we’re here to understand how they work and how we can react to them. Last, but not least, we can decide which and how many displays to enable, to better suit our app differentiated experience.