Preliminary Efficacy Trial of a Digital Intervention for Depression and Cannabis Use

This study tests a digital (app or online) mental health program designed to treat both depression and problematic cannabis use at the same time. Many people use cannabis to cope with depression, which can make both conditions harder to treat — this program aims to address both together. **You may be eligible if:** - You are 18 or older and live in the United States - You read and understand English - You have moderate symptoms of depression (as measured by a standard questionnaire) - You use cannabis in a way that causes problems in your life - You have access to a smartphone or computer **You may NOT be eligible if:** - You live outside the United States - Your depression is very severe and requires immediate clinical care - You are not interested in reducing your cannabis use - You have a condition that would make participating in a digital program unsafe Talk to your doctor to see if this trial is right for you.