Nowadays, we are surrounded by thousands of apps and each one is fighting for and trying to keep our attention. They differ in their purpose, but also in their appearance and method of use. In that sea of software products, only those that manage to keep us users interested survive. If we go back to a time when computers were still young and a new technology, we will be able to notice that the only thing that was important for the programs of that time was to function. Today, the function itself is not the main thing because in order to attract people to our product and make their user experience better, we have to improve many aspects of our product. Like the user experience the user interface eng. (Ux and Ui design), we need to test usability and design a good onboarding process for our users. Onboarding hrv. (Ukrcavanje) is the topic of this final paper. The purpose of this paper is to show the importance of this process and explain why it is crucial for the success of a product. In the initial parts of the paper, the theoretical part of onboarding is described and supported by several examples. Furthermore, the process itself is presented through a redesigned application of the Merlin system and each important item has its own example through which it is explained in more detail. It is designed to show the path of a single user through the first login to the system. Through this application, all the main concepts related to the concept of onboarding are presented, but also related ones such as Ux and Ui design. At the end of the paper, there is a conclusion that includes in more detail everything previously written in the final explanation of this process.