Young people living in the times of fast developing multimedia and technological progress are often not aware of the influence that modern technologies have on their health and well-being. The realised project covers three areas: health and sport, nutrition, modern technologies and was aimed at students, aged 16-19, of 3 secondary schools, their teachers, members of their families and the local communities. There were involved 96 students and 82 teachers, but there were also 5000 students, teachers, parents, members of local and global communities who benefitted from the project. The innovative aim was to raise awareness of the negative sides of unhealthy lifestyle and to implement health-promoting attitudes among the participants by means of designing and using a mobile phone application. The students designed a pro-healthy city game, which was played during exchange visit. The mobile phone application is of long-term character since it was used throughout the whole project and after its ending and its idea is to remind, inform and motivate all the participants regularly to lead a healthy lifestyle. The free of charge app is accessible on the project website and in an online shop. The project is interdisciplinary and multi-faceted as it concerns IT, Biology, Chemistry, Foreign Languages and Physical Education.The objectives were:• To develop pro-healthy lifestyle habits by introducing and implementing health-promoting attitudes;• To improve fitness of the participants in the time of the project by 10%;• To develop a habit of preparing and eating nutritious breakfast by 60% of the participants;• To broaden by 20% the knowledge concerning civilization diseases and their relation with nutrition and unhealthy lifestyle; • To improve basic programming skills needed for designing the application. During the project the participants learnt basic programming skills, ways of searching information on the Internet and checking its credibility, making presentations, applying IT tools to gather data, writing algorithm for the application. Besides that while working on questionnaires and articles the participants’ skills in reading and listening comprehension, critical thinking, team work were improved. Various techniques of team work were held; short films on nutritious meals were made; lectures by dieticians, doctors, trainers; interviews with grandparents about their diet were conducted as well as cookery workshops were performed. Students underwent a cycle of fitness tests; they participated in sport classes, bike trips, a volleyball tournament, yoga classes led by professional instructors. All the initiative is complimentary with the school syllabuses.We believe tthat through promotion of lifestyle conducive to health, which was the focus of the project, all the participants’ physical and emotional health improved. Health-promoting habits and prevention of civilization diseases were reinforced; the needs and practical skills concerning sports activities and healthy eating were developed. Thanks to communication with their peers the students developed their language competence as well as personal and citizen traits. Cooperating teachers broadened their knowledge and experience connected with promotion of healthy lifestyle; practised their managerial and operating modern technologies skills; learnt modern ways of promotion, new methods of teaching, improved interrelation-related competences; enriched their knowledge of multicultural differences.Through international cooperation, school exchange visits, steady online contact, mobility among the participating schools was developed. The schools established their reputation of institutions for which intellectual and psychophysical development of the students is a priority. Their educational offer was enriched by multicultural values.We believe that the actions covered by the project stimulated the participants to reflect on their lifestyle and led to implementation of health-promoting attitudes while, at the same time, motivated to develop modern technologies competences. We claim that in the future the outcomes of the project will serve further education of healthier and enlightened young people, which relates to the Euro 2020 strategy.