knoke

I think a good way to think about emotions and feelings is by strictly separating them conceptually: Feelings are bodily effects like fear, anger, hunger, arousal... while emotions are learned acts of communication. Emotions are interpretations of feelings and Emotions are communicated feelings, arranged in complex patterns or "scripts" that are culturally highly variable. So you could say that all emotions (outward, visible acts of communication) are based on more "invisible" feelings. Take mourning for example. The feelings are a mixture of fear, but how you mourn is extremely variable over cultures, times and even intrapersonally. Emotions have to be learned, feelings are the raw material or puzzle pieces the body/mind offers from birth.

for me it really starts with the home screens and most of the apps are arranged: the lower third of the mobile screen is underused while the top third is full of interesting things that I can hardly reach.

But you're right, of course. There are more and more action menues in the bottom right. But take a typical Apple app like Mail.app. In the bottom right there is only one action: write a new mail. The next step, after clicking it, is entering some information that in many cases will involve clicking something in the header field in the top third of the screen. Even send is at the very top right corner. Oh, the thumb movements...