Digital Therapeutic for Adolescent Depressive Symptoms in Cardiology and Gastroenterology

Self-report assessments will be collected at pre, post and 1-month follow up time points. Weekly PHQ-8 assessments will also be collected during the 5-week intervention as well as at pre, post and 1- month follow up time points. Study aims involve evaluating: * Feasibility of recruiting and enrolling adolescents with elevated symptoms of depression from the Cardiology and Gastroenterology programs at CHLA. * Retention, program adherence, completion, and withdrawal rates. * Safety of the intervention, including reported adverse and serious adverse events * Perceived utility, usability, and enjoyment of the SparkRx app by adolescents * Clinically significant changes in pre- to -post treatment depressive symptoms and persistence of such gains at 1 month follow up.