Evaluation of the PE Coach Mobile Application Among Veterans With PTSD

This study is testing a mobile app called PE Coach that helps veterans manage PTSD therapy exercises at home alongside their regular treatment. **You may be eligible if...** - You are a veteran between 18 and 65 years old - You are enrolled in VA healthcare and qualify for PTSD therapy - You have a current PTSD diagnosis with a moderate-to-severe severity score - You speak and read English - You are willing to attend one-on-one therapy sessions (in person or by video) and use a smartphone or tablet **You may NOT be eligible if...** - You have a serious neurological condition like ALS or severe brain injury that would interfere with therapy - You currently have thoughts of suicide - You have a serious mental health condition with psychosis (e.g., schizophrenia) - You are in an ongoing dangerous situation such as domestic violence - You have severe alcohol use disorder - You have already completed 3 or more sessions of Prolonged Exposure (PE) therapy for PTSD - You are currently in another recommended PTSD therapy program - You have not been on stable psychiatric medications for at least 6 weeks Talk to your doctor to see if this trial is right for you.