Thefight against sexismisnowadays oneofthe flagshipsocialmovements inwesterncountries.Adolescence is acrucialperiod,andsome empirical studieshave focusedonthesocializationofteenagers,provingthatthe socialization with the surrounding environment prevent sexist practices. In a previous work, we developed andtested the effectiveness of a mobile app, called Liad@s, with the goals of helping teenagers to prevent sexism and build healthy couple relationships. In this article, we carry out a study where (using a real situation) we compare the effectiveness of the Liad@s app in front of traditional interventions like a workshop about sexism for teenagers. Also, we evaluate the usability of the app and the user satisfaction with this application. In this study, our primary hypothesis is that the effectiveness of using our mobile application, in terms of knowledge acquired about sexism, would be at least as good as attending the workshop. Our secondary hypothesis is thattheuser satisfactionwiththemobileapplicationwouldbehigherthantheonewiththe workshop, causing a preference forthe app.The results ofthis study show significant differences in learning appeared between gender and between the two different procedures when separately evaluating the data collected from both hostile sexism (HS) and benevolent sexism (BS) questionnaires. These results validate our primary hypothesis. Also, most of the population under study preferred the mobile app in front of the traditional workshop, validating also our secondary hypothesis