 Each eMOCHA session will feature multiple-choice and free-text question items related to three domains: engagement in HIV care retention and adherence, drugalcohol use, and mood. The drug use items will query participants regarding the intensity of drug cravings and the occurrence of any drug use. The brief version of the Profile of Mood States POMS will be used to assess moods such as anger, depression and anxiety. Within each domain, the eMOCHA application will guide the participant through three steps that 1 assess the participants current experiences or symptoms, 2 assess barriers to engagement in care, and 3 provide support messages or information. Peer navigators will monitor the responses of each participant over time, and will contact the participant if he or she reports specific problems, or appears to have increasing levels of self-reported negative mood states, drug use, or poor medication adherence. 