for males ages 18-29 (full criteria)
Healthy Volunteers
healthy people welcome
at San Francisco, California
study started
estimated completion



The PHASTT Study is focused on understanding of facilitators and barriers to mHealth use among young Black men who have sex with men (MSM), and testing a novel mobile app to increase HIV/STI testing and PrEP uptake.

Official Title

Randomized, Controlled Trial of the Sex Pro Mobile App for Young Black MSM in San Francisco and Oakland, CA


The Sex Pro mobile application (app) being tested facilitates home HIV-testing, home sexually transmitted infection (STI) test self-collection, and pre-exposure prophylaxis (PrEP) uptake. The app integrates a personalized HIV risk assessment with home HIV and STI testing options for young, Black MSM.


Risk Reduction HIV Sexually Transmitted Infections (Not HIV or Hepatitis) mHealth HIV Prevention Sexually Transmitted Diseases Sex Pro mobile Application


You can join if…

Open to males ages 18-29

  • Self-identify as Black.
  • Self-report being HIV negative.
  • Report anal sex with at two or more male sex partners in the prior 12 months.
  • Own an iOS or Android mobile phone.
  • Willing and able to give written informed consent to participate in all activities outlined by the protocol.

You CAN'T join if...

  • Inadequate contact information for follow-up
  • In a mutually monogamous sexual relationship for the past 12 months
  • Currently taking PrEP
  • Does not have reliable access to the internet
  • Does not live, work or play in the San Francisco Bay Area
  • Currently enrolled in another HIV intervention study
  • Prior enrollment in an HIV vaccine trial with receipt of experimental vaccine product
  • Any medical, psychiatric, or social condition, or occupational, or other responsibility that, in the judgment of the investigator, would make participation in the study unsafe, complicate interpretation of study outcome data, or otherwise interfere with achieving the study objectives.


  • Bridge HIV, San Francisco Department of Public Health accepting new patients
    San Francisco California 94102 United States


accepting new patients
Start Date
Completion Date
Public Health Foundation Enterprises, Inc.
Study Type
Last Updated