Over the past few decades, global cities have become an increasingly important term due to the urbanization process. They face many problems that require smart solutions. Therefore, the concept of a smart city emerged and will be described explained in this paper. Smart cities are a commonly used term today, however, the question is: How many of them are smart and are they implementing smart solutions? The answer to these questions is researched in the paper, by using the examples from Croatia and the world. The author will answer and substantiate their claim whether they view the smart city as a myth or as a truth. As an example, services and solutions of Singapore will be described in detail. Furthermore, the results of a survey conducted in Croatia showed how change is happening and how cities are implementing smart solutions, however, they are far behind European cities. Smart City is presented as a model that faces key problems using technology, smart management, smart solutions and people's potential. In this way, it affects the quality of life and its citizens, the efficiency of urban services, transport, the environment, the optimal use of resources and poverty. Smart cities are what some may call ‘a new 21st century industry’, the potential for its global commercialization depends the capability of citizens and nations to utilize them, to create a more sustainable and smarter cities. It can be said that it is an initiative to redesign cities to make them smarter and more sustainable.