All participants will receive the standard discharge education from their transplant and inpatient care team.

Patients who are assigned to the myFAMI group will also have the smartphone application downloaded onto either the family member's smartphone or a study-provided smartphone. Following discharge from the hospital, participants will use the smartphone application to answer nine daily questions regarding tracking family coping, transplant symptoms, family management of child transplant symptoms, and family-management difficulty with medication and follow-up regimen daily for the first 30 days following discharge.

Family members assigned to the control group (standard care) will receive standard post-discharge follow-up care consisting of discharge education during the transplant hospitalization and at regularly scheduled appointments instructing families to contact the research nurse with problems or questions.

Patients who are assigned to the myFAMI group will also have the smartphone application downloaded onto either the family member's smartphone or a study-provided smartphone. Following discharge from the hospital, participants will use the smartphone application to answer nine daily questions regarding tracking family coping, transplant symptoms, family management of child transplant symptoms, and family-management difficulty with medication and follow-up regimen daily for the first 30 days following discharge.

Primary family member receiving myFAMI compared to the primary family member receiving standard post-discharge care will have improved post-discharge coping (primary outcome). Coping will be measured using the post-discharge coping difficulty scale. Post Discharge Coping Difficulty Scale (PDCDS), 10-item measure, Scale 0-10, Measures parental and family member difficulty coping with stress, recovery, self-care and management, support, and confidence, α= .84

Primary family member receiving myFAMI compared to the primary family member receiving standard post-discharge care will have decreased use of healthcare resources defined as number of emergency department visits and number or readmissions to the hospital.