The aim of the thesis is to create a mobile fitness application that allows the user to easily track their progression and optimize training routine. In the theoretical part, the student will perform an evaluation of existing solutions. Availability of technological options will be discussed and suitable technologies will be selected. In the applied part, the student will analyze, design and implement fully functional mobile application. The minimum functional requirements are as follows: Creating and editing training plans; Starting a training session with a template; Showing various statistics about the user's data as well as their general progression; Showing the history of the performed training sessions.