“…In addition, the COVID-19 pandemic experienced in the last two years has had a major influence on the decline in the physical activity levels (Elnaggar et al, 2022 ; Yomoda & Kurita, 2021 ), deteriorating physical fitness (López-Bueno et al, 2021 ), and adherence to the Mediterranean diet (AMD) (Sánchez-Sánchez et al, 2020 ), while also increasing the variables related to fat mass (Karatzi et al, 2021 ), as well as the increased use of new technologies by adolescents (Ventura et al, 2021 ). Among the new technologies most widely used in this population, mobile phones stand out as being commonly associated with mental disorders and sedentary behavior in adolescents (Fanchang et al, 2021 ; Xiang et al, 2021 ), as well as poorer peer relationships and academic performance (Legkauskas & Steponavičiūtė-Kupčinskė, 2021 ). However, mobile phones also offers a multitude of possibilities for the establishment of healthy lifestyle habits, among which mobile applications stand out (Groen et al, 2022 ; Kracht et al, 2021 ).…”