The study will test a computerized treatment with subjects ages 13-17 years who are interested in seeking treatment for alcohol and/or cannabis use. Follow-up assessments will be conducted at one- and three-months following treatment.

This study tests a mobile app that aims to reduce alcohol use and risky sexual behavior.

Interested individuals will complete an online screener to see if they are eligible. Eligible participants will be consented into the study, and study participation involves six mobile sessions over the course of about 45 days.

The first and the last session will be completed via video conference with a member of the research staff. The second through fifth sessions are completed independently on the mobile app. Sessions involve survey questionnaires, clinical interviews, and computerized tasks. Participants will be compensated for completed study sessions.