NightWare Open Enrollment Study

Inclusion Criteria: New to NightWare * Self report of diagnosis with PTSD * Self-report of PTSD-related repetitive nightmares contributing to disrupted sleep. * Equal to or older than 18 years of age. * Proficient in both reading and writing in the English language. * Pittsburgh Sleep Quality Index (PSQI) score equal to or greater than 10. * ESS: On question #8 any score above "0" will prompt an additional question: * Do you drive ("get behind the wheel") when you are drowsy? * Answer must be "No" to be enrolled in the study for safety. * Participant owns or has access to devices appropriate for participation in the study including compatible Apple Watch and Apple iPhone. * Wireless Internet and two power outlets where they sleep. OR Current NightWare user - Is a participant in current NightWare consumer preference study or has successfully completed any NightWare study protocol. Exclusion Criteria: New to NightWare * Circadian rhythm disruption on a regular basis (shift-work) * Concurrent presence of prohibited diagnoses * Known diagnosis of OSA * Diagnosis of an active disorder of arousal from non-rapid eye movement sleep * Diagnosis of rapid eye movement sleep behavior disorder * Diagnosis of narcolepsy * Diagnosis of dementia * Uncontrolled atrial fibrillation * Use of Alcohol or Drugs as specified: * Alcohol Use Disorders Inventory Test (AUDIT) (score of 8 or higher) * Drug Abuse Screening Test-10 (DAST-10) (score greater than 2) * Suspicion of nightmares being se…