Robustness and Usability of the Dreem 3 System for at Home Sleep Monitoring in an Insomnia Population.

Inclusion Criteria: * Subjects must be ≥ 22 and ≤ 70 years old inclusive, including: * 8 subjects under 55 years old. * 7 subjects over 55 years old. * Subjects who are under the care of a sleep clinician for experiencing insomnia symptoms. * Subjects have wifi connection at their home. * Subjects have a smartphone where they can install the Alfin App. * Subjects agree to not having abnormal drugs or alcohol consumption 24 hours before the start of the measurement, and during the 3 days of measurement. * Able to read, understand and sign an informed consent form. Exclusion Criteria: * Under 22 and above 70 years old inclusive. * BMI ≥ 40. * Obstructive sleep apnea diagnosis with ongoing CPAP therapy. * Abnormal drugs or alcohol use during the measurement part of the study. * Head circumference \< 53 cm or device fitting issues as determined during training. * Not able to read, understand and sign an informed consent form.