The goal of this clinical trial is to learn if the "Smart Nurse" artificial intelligence-supported mobile application improves nutrition, exercise, and sleep behaviors in high school students aged 14-18 years. The main questions it aimed to answer are:
* Did the "Smart Nurse" app improve healthy nutrition and exercise behaviors in adolescents?
* Did the "Smart Nurse" app improve sleep quality in adolescents?
* Did the "Smart Nurse" app lower body mass index (BMI) and waist circumference in adolescents?
Researchers compared participants who used the "Smart Nurse" app to participants who did not use the app to see if the app improved health behaviors.
Participants:
* Used the "Smart Nurse" mobile app every day for 12 weeks
* Recorded their daily meals, physical activity, and sleep time in the app
* Received personalized health messages based on their data
* Completed health surveys and body measurements at the beginning and end of the study