Testing Adaptive Interventions to Improve Posttraumatic Stress Disorder Treatment Outcomes in Federally Qualified Health Centers

Inclusion Criteria: * Receive care at a participating federally qualified health center (FQHC) * Have a Posttraumatic Stress Disorder checklist (PCL-5) score greater or equal (≥) to 33 * Own a mobile device that can be used for the PTSD Coach App * Have had psychotropic medication stability for at least 4 weeks Exclusion Criteria: * Severe cognitive impairment that in the judgment of the investigators makes it unlikely that the participant can adhere to the study regimen (as evidenced by confusion, inability to track discussion or answer questions, or other clear and significant indicators of cognitive impairment) * High risk of suicide (defined as meeting criteria for Action Step 3 on the Participant Suicide Risk Screening form * Severe alcohol or substance use disorder (moderate-severe alcohol use disorder on Alcohol Use Disorders Identification Test (AUDIT) (scores ≥ 15) or high risk on National Institute on Drug Abuse Quick Screen (scores ≥ 27)) * Active psychosis or unmanaged bipolar disorder * Unstable housing * Current engagement in a trauma-focused behavioral treatment (such as Prolonged Exposure or Cognitive Processing Therapy). * Patients who do not speak English will be excluded for logistical reasons.