Developing Android, iOS Apps for Mobile-Enhanced Prevention Support (MEPS) for Men Who Have Sex with Men (MSM) and Transgender Women (TW) Leaving Jail in South Los Angeles in the USA.

MSM and TW personnel, who underwent criminal justice involvement (CJI) in the USA, have a particularly high HIV burden. The post-incarceration period following community reentry is critical for addressing potential risks of HIV/STI acquisition and negative sequelae of substance use. To address this scenario, we designed a new intervention that includes a GPS based mobile app (called GeoPass), peer support and incentives for promoting the use of HIV prevention, substance use treatment, and related services.