The goal of this thesis is the analysis, design, and implementation of a mobile interface for a system that will create, manage and evaluate cybersecurity quizzes for the company Ahead Itec. The student will analyze the simultaneous development process for iOS and Android mobile platforms. The work will also contain an overview and comparison of UI development approaches, API mocking, automated testing, CI/CD pipeline integration into the development process, and mobile application development approaches. The student will then use acquired knowledge during the implementation of the mobile interface for both platforms. The mobile interface will consist of two sections. First will be the implementation of SDK, where the student will design SDK architecture and its API with backend integration. The student will implement this interface in such a way that it can be reused and integrated into various applications. In the second part of the implementation, the student will integrate the created SDK into the existing application and implement a graphical interface according to materials from UX/UI designer. This thesis is created in collaboration with FI industrial partner, company Ahead Itec.