In this thesis, we described the concept of augmented reality, programs used for the development of augmented reality applications, and how to create individual components using those programs. In the first chapter, we explained the terms augmented reality and virtual reality and described the differences between them. Then, we gave a brief history of developing the concept of augmented reality and technologies needed for the development of AR apps. After that, we described the concepts of tracking, calibration, and registration in the context of augmented reality, as well as the way in which an augmented reality application recognizes the target objects. The last part of the chapter describes methods that an application uses for showing virtual objects in a real environment as convincingly as possible. In the second chapter, we described programs used for the development of augmented reality apps – Unity and Vuforia. We explained how to install both programs, set up the settings, create user accounts, and we introduced their content and usage, as well as how to build and run the apps. In the third chapter, we listed some components available in Unity and Vuforia. Thereby, we described how to use them within the programs and provided some examples of possible problems that may occur while using the application, as well as the methods for solving them.