eSTEP: An Integrated mHealth Intervention to Engage High-risk Individuals Along the Full PrEP Care Continuum

The long-term goal of this research is to develop a theoretically grounded, effective, accessible and sustainable mHealth PrEP care continuum intervention for men who have sex with men (MSM) and transgender women (TW). To reach this goal, the investigators will compare study outcomes among persons randomized to receive a mobile app (eSTEP) intervention tailored to the needs of MSM and TW plus usual PrEP care to a group of persons who only receive usual PrEP care.

Inclusion Criteria: * 18 years of age or older * Assigned male sex at birth * Current male \& MSM identity OR transfeminine (woman, transgender woman, or non-binary) identification * Self-reported HIV-negative status * English-speaking (since the pilot intervention will be developed in English) * Owner of an Android or iPhone mobile device and access to this phone during the 6-month study. * Willingness and ability to attend HIV prevention visits at the HIV treatment and prevention clinic. * Consent to allow study team access to study-relevant PHI * Eligible for PrEP following CDC guidelines (in the past 6 months had a sexual partner with HIV with unknown or detectable viral load, inconsistently used condoms, and/or was diagnosed with a sexually transmitted infection) * Has never used PrEP or has not used PrEP in the past 3 months Exclusion Criteria: * Was a Community Advisory Board Member or participant in the eSTEP focus groups * Assigned female or intersex at birth * Living with HIV * Already taking PrEP * Under 18 years old * Does not own a mobile phone * Does not speak or read English (since the pilot intervention will be developed in English)