Since the introduction of external apps for mobile devices with the first iPhone over ten years ago, the number of apps has exploded a million fold. Today there is a small tool for every imaginable situation. However, only a handful have established themselves over the long term. The typical user chooses his favourite app not only according to attributes such as functionality, compatibility and design. It also has to be subjectively perfect.
In this thesis, approaches to a modern user interface were analysed and evaluated, and also compared with existing theoretical and practical examples. In the process the usability and implementation of diverse UI and UX elements were highlighted, as well as the emotional connection they have with the user.