Mobile Weight Loss Intervention for Adolescent and Young Adult Cancer Survivors

Participants will receive a smart scale, activity tracker, an individual kickoff videochat session with a health coach, and access to a mobile smartphone app that includes weekly behavioral lessons, dietary tracking log, daily weight-related behavioral goals, tailored feedback summaries, and in-app health-related messages.

Participants will receive lessons about positive psychology (PP) strategies, weekly goals for PP exercises, and in-app health-related messages that include reminders to practice PP exercises.

Participants will receive weekly individual videochat sessions with a health coach.