Possemato et al: CS-PTSD Coach has high provider and patient acceptability. Kuhn et al (2014): After several days of use, users rated the app has moderately to very helpful with their PTSD symptoms. Miner et al: A community sample of trauma survivors with PTSD symptoms (N 49) were randomized to 1 month using PTSD Coach or a waitlist condition. Participants reported using the app several times per week, that PTSD Coach components were moderately helpful and that they had learned tools and skills from the app to manage their symptoms. Between conditions effect size estimates were modest for PTSD symptom improvement, but not statistically significant. Kuhn et al: 120 participants were randomized to either a PTSD Coach or a waitlist condition for 3 months. PTSD Coach participants had significantly greater improvements in PTSD symptoms, depression symptoms, and psychosocial functioning than did waitlist participants; however, at posttreatment, there were no significant mean differences in outcomes between conditions. A greater proportion of PTSD Coach participants achieved clinically significant PTSD symptom improvement than waitlist participants.