In an increasingly globalized economy, banks and other financial institutions are operating internationally across countries and cultures in many cases. This thesis researches the usage behavior of and attitudes towards Mobile Banking Applications in Austria and South Korea. Based on existing literature, a questionnaire is developed which does not only include general questions about usage behavior, but also focuses on different constructs which are analyzed and compared between both countries. Regarding the usage behavior, the following is found: Not only the penetration with mobile devices like smartphones and tablets, but also the rate of utilization of Mobile Banking Apps are higher in South Korea than in Austria. In both countries most used features are checking the account balance, checking recent transactions, and making a transfer of money. Reasons for not using Mobile Banking Apps are mainly a lack of trust in security and privacy. Regarding the attitude towards Mobile Banking Apps the questionnaire includes seven different constructs: Performance Expectance, Effort Expectance, Social Influence, Security, Privacy, Perceived Financial Cost, and Facilitating Conditions. In this part of the questionnaire, a scale ranging from 1 to 5 is used to find out the level of agreement with given statements. Using a t-test for independent samples, it is found that the differences between Austria and South Korea concerning these constructs are statistically significant. On average, Korean respondents expect higher performance, while trust in security and privacy is higher among their Austrian counterparts.