Mobile Health Application for Family and Behavioral Health Provider Communication

Inclusion Criteria: For Veteran: * Age 18 or older * Served in a branch of the US military since October, 2001 * Meets DSM-5 criteria for current PTSD as measured by the Clinician-Administered PTSD Scale for DSM-5 (CAPS-5); * Reports at least one episode of anger or irritability in the past week; * Has and regularly uses an iOS (iPhone 5s or higher with iOS 8 or higher) or Android (with 4G network and Android 4.1 or higher) smartphone with a data plan; * Has a family member or friend who also has and uses a smartphone with a data plan and agrees to participate in the study. * Is able and willing to attend 12 weekly sessions at Duke Psychiatry offices within normal business hours (M-F 8:00-5:00) For Collateral: * 18 years old or older * Has and regularly uses an iOS (iPhone 5s or higher with iOS 8 or higher) or Android (with 4G network and Android 4.1 or higher) smartphone with a data plan; * Has a family member or friend who meets the veteran inclusion criteria and agrees to participate in the study. Exclusion Criteria, Veteran: \- Is currently participating in, or is scheduled to participate in a manualized psychosocial treatment.