iTransition Development

Inclusion Criteria: For YLH Historical Control Group * YLH (regardless of gender/assigned sex at birth) age ≥ 18 years; * Has plan for HCT within next 6 months; * Enrolled in care at Grady IDP pediatric/adolescent clinic or CHOP AI/SI clinics. For YLH iTransition Intervention Group * YLH (regardless of gender/assigned sex at birth) age ≥ 18 years; * Has plan for HCT within next 6 months; * Enrolled in care at Grady IDP pediatric/adolescent clinic or CHOP AI/SI clinics; * Owns a smartphone and/or tablet * Reports consistent internet access (defined as no lapse \>24 hours in last 6 months) via their smartphone or tablet. For Provider Group * Staff member at Grady IDP (pediatric/adolescent clinic, adult women's clinic, and/or adult men's clinic), CHOP AI/SI clinics, UPHS: HUP or Presby infectious disease clinics; * Works with transitioning YLH; * Access to internet via any device (e.g., smartphone, tablet, computer); * Endorse participation in the HCT process. For Transition Champion Group * Staff member at Grady IDP (pediatric/adolescent clinic, adult women's clinic, and/or adult men's clinic), CHOP AI/SI clinics, UPHS: HUP or Presby infectious disease clinics; * Works with transitioning YLH; * Endorse participation in the HCT process; * Access to internet via any device (e.g., smartphone, tablet, computer); * Nominated by clinic staff where employed to be iTransition intervention point person (champion). Exclusion Criteria For YLH Historical Control Group * Youth who are \<18 years old; * Youth who are not living with HIV; * Transition is not expected (from pediatric/adolescent to adult care) within the next 6 months; * Presence of serious psychiatric symptoms (e.g., active hallucinations, thought disorder) that would impair the individual's ability to provide true informed consent or participate in the study activities; * Visibly distraught (e.g., suicidal, homicidal, exhibiting violent behavior) at the time of consent. For YLH iTransition Intervention Group * Youth who are \<18 years old; * Youth who are not living with HIV; * Transition is not expected (from pediatric to adult care) within the next 6 months; * Does not own smartphone/tablet and has inconsistent internet access (i.e. has had one or more lapse \>24 hrs in the last three months); * Presence of serious psychiatric symptoms (e.g., active hallucinations, thought disorder) that would impair the individual's ability to provide true informed consent or participate in the study activities; * Visibly distraught (e.g., suicidal, homicidal, exhibiting violent behavior) at the time of consent. For Provider Group * Not a staff member at Grady IDP, CHOP SI/AI, UPHS: HUP or Presby infectious disease clinics; * Does not work with transitioning YLH; * Does not have access to internet via any device (e.g., smartphone, tablet, computer). For Transition Champion Group * Not a staff member at Grady IDP, CHOP SI/AI, UPHS: HUP or Presby infectious disease clinics; * Does not work with transitioning YLH; * Does not have access to internet via any device (e.g., smartphone, tablet, computer).