Screen Time

The goal of this clinical trial is to learn whether a short, self-guided program for cutting down smartphone screen time can reduce symptoms of depression in young adults. It includes students in Oslo, Norway, who have applied for help at the student mental health service (SiO Mental Health). The main questions it aims to answer are: * Does a 2-week screen time reduction program reduce symptoms of depression? * Does it reduce symptoms of anxiety? * Can a simple, widely available phone app reduce screen time, and does the reduction last? Researchers will compare students who start the program right away with students who continue their usual care for 2 weeks and receive the same program afterwards. Participants are placed in one of the two groups by chance, like flipping a coin. Participants will: * Answer questionnaires about depression and anxiety symptoms at the start and again after 2 weeks * Upload screenshots of the Screen Time summary on their iPhone at the start, after 2 weeks, and after 12 weeks * Install an app that blocks the apps they find most distracting and keep it active for 2 weeks, if they are placed in the program group * Take part entirely online, with no clinic visits and no contact with the study team

The goal of this clinical trial is to evaluate whether a home-based mHealth intervention can improve adherence to the 24-Hour Movement Guidelines in preschool-aged children (3-4 years old) who currently meet 0 or 1 of the guidelines for physical activity, sedentary behavior, and sleep. The main questions it aims to answer are: * Can the intervention increase the proportion of children meeting all three 24-Hour Movement Guidelines (physical activity, screen-time, and sleep)? * Is the intervention feasible for parents to implement, as measured by a parent feedback survey? Researchers will compare an intervention group to a waitlist control group to assess whether the intervention leads to increased guideline adherence. Parents and Participants: * Children will wear an accelerometer to track physical activity and sleep patterns. * Parents will use a mobile app that delivers weekly lessons and behavior-related goals to encourage healthy movement behaviors in their children. * Parents will complete questionnaires on their child's movement behaviors and development at baseline, 6 weeks, and 12 weeks. * Additionally, children will undergo motor skills assessments, and parents will provide feedback on cognitive development and behavioral changes.