The LG G4 smartphone and its graphical user interface UX 4.0 form a coherent whole. The curved shape of the mobile phone is emphasised by its intuitive use with the help of fluid motion. For instance, the unlocking of the phone with a simple swipe of the finger has an organic feel. The main focus in the design of the apps, which are represented by coloured icons, was on user-friendliness. Thus the list height and font size were optimised for the IPS Quantum Display. Thanks to a high degree of saturation and strong contrasts, the colour reproduction of the user interface is strong and vibrant.