The main goal of this paper is the identification of comments on internet websites. The theoretical part is focused on artificial intelligence, mainly classifiers are described there. The practical part deals with creation of training database, which is formed by using generators of features. A generated feature might be for example a title of the HTML element where the comment is. The training database is created by input of classifiers. The result of this paper is testing classifiers in the RapidMiner program.

This diploma thesis is focused on mobile application design and development for Android operating system. Mobile application development methods and tools were used in order to accomplish set goals. The application is implemented in Java programming language with use of Jsoup library. The main purpose of the application is to allow access to Brno University of technology’s information system on mobile devices.

The aim of the thesis is to summarize characteristics of successful and profitable applications on Android market and create a starting point for beginner developers. The market for mobile applications behaves like any other market, so people cannot be successful without its knowledge. That´s why this thesis is primarily focused on analyzing the market. Learned information will be later used for the design and implementation of new application.