The subject of this thesis is to compare the most widely used mobile operating systems from the perspective of the development, distribution and monetization of applications developed for these systems. Compared systems are Android, iOS, Symbian OS, Windows Phone and BlackBerry OS. The thesis defines a total of 16 criteria against which systems are compared. These criteria are further divided into three categories, namely SDK features, functionality and distribution and monetization. All criteria have assigned weights which are determined by the paired comparison method using the Fuller's triangle, which is part of the Annexes of this work. Practical part of this thesis is focused on determining the values of defined criteria. Each criterio...