Combatting HIV Or Other STIs Early (CHOOSE) in an RCT of mHealth Tool Support

Inclusion Criteria * Age 13-24 years, inclusive; * Self-reports being at increased likelihood for HIV acquisition, defined as having anal sex with a male in their lifetime; * Owns an iOS or Android Smartphone and able to access all elements of the PrEP Choice package; * Not currently on PrEP and interested in learning more about PrEP; * Is not living with HIV; * Weighs at least 35 kg; * Willing to receive PrEP care from a provider at a participating ATN SC; * Able to understand, read, and speak English; * Able to participate at the study site; and * Willing and able to provide written informed consent. * If of legal age or otherwise able to provide independent informed consent as determined by local law and consistent with IRB policies: Willing and able to provide written informed consent for study participation. * If not of legal age or otherwise not able to provide independent informed consent as determined by local law and consistent with IRB policies: Parent or legal guardian is willing and able to provide written informed consent for study participation and potential participant is willing and able to provide written assent for study participation. Exclusion Criteria: * Female; * In a mutually monogamous sexual relationship with a partner not living with HIV for the past 12 months; * Currently participating in an interventional trial of PrEP agents, or prior enrollment in HPTN 083, HPTN 083-01, or any other study of long-acting PrEP (including PURPOSE- 2 lenacapavir s…