Mobile Mindfulness Training (mMT) for People in Medication Treatment of Opioid Use Disorder (MOUD)

The goal of this clinical trial is to learn if mobile mindfulness training can help people in treatment for opioid use disorder. The main questions it aims to answer are: * Will people with opioid use disorder and childhood trauma use mobile mindfulness training? * Will mobile mindfulness training help people with opioid use disorder and childhood trauma have decreased markers of psychological stress? Participants will: Be given access to mobile mindfulness training and encouragement to use it daily for 30 days. Keep a diary of how often mobile mindfulness training is used. Visit the clinic four times to measure stress levels, including written rating scales, blood work, and heart rate tests.