A Multiple Health Behavior Change, Self-Monitoring Mobile App for Adolescents: Development and Usability Study of the Health4Life App

Louise Thornton   ^{1, 2, 3} , BPsych (Hons), PhD ;   Lauren Anne Gardner   ¹ , BPsych (Hons), PhD ;   Bridie Osman   ¹ , BSc (Hons) ;   Olivia Green   ¹ , BPsych (Hons), MRes ;   Katrina Elizabeth Champion   ¹ , BAPsych (Hons), BHealth, PhD ;   Zachary Bryant   ¹ , BComm ;   Maree Teesson   ¹ , BPsych (Hons), PhD ;   Frances Kay-Lambkin   ² , BSc (Hons), PhD ;   Cath Chapman   ¹ , BA (Hons), PhD ;   The Health4Life Team   ^{1, 2, 4, 5, 6, 7}

¹ The Matilda Centre for Research in Mental Health and Substance Use, The University of Sydney, Sydney, Australia

² Priority Research Centre for Brain and Mental Health, The University of Newcastle, Newcastle, Australia

³ School of Public Health and Community Medicine, University of New South Wales, Sydney, Australia

⁴ Department of Exercise Physiology, School of Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, Sydney, Australia

⁵ Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States

⁶ National Drug Research Institute, Curtin University, Perth, Australia

⁷ School of Psychology, Centre for Youth Substance Abuse Research, The University of Queensland, Brisbane, Australia