The SleepHealth app is available to anyone in the U. as a free download from the App Store, with plans for global expansion in the near future. Study participants must be at least 18 years of age and understand English. The app includes a simple process to ensure informed consent for participation in the study. To help maintain participant privacy, subject names are removed from the study data. For more information about the SleepHealth Mobile App Study, visit Sleeptember.org.