Nowadays, it is hard to imagine a world without smartphones. In 2021, 3.8 billion people worldwide use smartphones, which means about 50% of the world's total population.
In the developed countries, as many as 75% of adults own a smartphone. Estimates assume that there are more than 14 billion active smartphones worldwide. That is nearly twice the population of the world. To analyse a smartphone more concrete, the paper will focus on the iPhone, which is the flagship product of Apple.