Inclusion Criteria:  iOS user Sub-clinical threshold insomnia symptoms (Regensburg Insomnia Scale Score 13-24) ≥ 18 years old. Naive to the SleepScore Labs App Able to fully understand information on data protection and provide written informed consent  Exclusion Criteria:  Non-iOS device users due to technical restrictions of the application  Any of the following medical problems:  Untreated psychological disorder affecting sleep (e.g., clinical depression, bipolar disorder, schizophrenia)  Any of the following medications/substance use:  Prescription sleep medications or regular use of over-the-counter sleep medications (e.g., melatonin, ZzzQuil) Medications for other conditions (e.g., anxiety, ADHD) that affect sleep Consumption of 3+ units of alcohol on 4 or more nights per week Recreational drug use Pregnant or nursing mothers Shift work Travel across 2 or more time zones during study period Travel overnight for more than 7 total days during study period Users where a diagnosis of sleep disorders has been confirmed Users where a treatment for sleep disorders has been prescribed