 The study aimed to evaluate the long-term effectiveness of a multi-component mobile health intervention, which combined a smartphone app, an activity tracker wristband, and brief counseling, on weight loss and improving body composition, physical activity, and caloric intake in Spanish sedentary adults with overweight or obesity. The results showed that the intervention group had significant improvements in weight, BMI, waist-height ratio, body adiposity index, waist circumference, and hip circumference at 12 months compared to the control group. However, these improvements were not maintained once the devices were collected, and there were no differences in nutritional outcomes between the groups. This article was authored by Cristina Lugán-Sanchez, Jose Irecio Rodriguez, Cristina Aigudo-Condé, and others.