Inclusion Criteria for Adolescents:  admitted to residential treatment due to concerns about frequency and/or severity of substance use report alcohol and/or drug use in the past 90 days be discharged to live with primary guardian fluent in English or Spanish willing and able to participate in a 2 hour interview prior to discharge from residential  Exclusion Criteria for Adolescents:  does not report alcohol or drug use in the past 90 days discharge plan does not include living with primary guardian not fluent in English or Spanish not willing or able to complete baseline interview  Inclusion Criteria for Parents:  parent or legal guardian of adolescent aged 12-18 years inclusive, at project start adolescent admitted to residential treatment due to concerns about frequency and/or severity of substance use will be primary guardian living with adolescent after discharge from residential fluent in English or Spanish willing and able to complete the baseline assessment prior to the adolescent's discharge access to a smartphone that can receive text messages and reliably access the internet  Exclusion Criteria for Parents:  not legal guardian of adolescent or adolescent not aged between 12-18 years adolescent not admitted to residential treatment due to substance use concerns will not be living with adolescent after adolescent's discharge from residential not fluent in English or Spanish not willing or able to complete the baseline assessment prior to the adolescent's discharge does not have access to a smartphone that can receive text messages and reliably access the internet