To study whether Somfit is substantially equivalent to an existing approved device (i.e. Compumedic's Grael System) to assist in elucidating sleep disorders.

Sleep is recognized as one of the three pillars of health (i.e. nutrition, exercise and sleep). Poor quality and fragmented sleep leads to an increase in the risk for development of chronic health conditions. Given the importance of good quality sleep and its critical role in overall well-being, there is a need for regular monitoring and assessment of sleep quality in individuals. However, current technologies will only allow for this to be performed in sleep clinics and with the help of full polysomnography (PSG) systems which require the patients to spend a night at the clinic with several wired electrodes connected to their scalp. This will cause discomfort for the patients in a long run. To solve this problem, Compumedics has recently developed a miniaturized, portable and affordable sleep monitoring system with code name of "Somfit" which can be used in the comfort of patients' home. The aim of this study is to validate Somfit for home based sleep studies.

Inclusion Criteria:

• Individuals age between 18 to 75
• Be able to give informed consent
• Individuals with diagnosed Obstructive Sleep Apnoea (OSA)

Exclusion Criteria:

• Less than 18 years of age
• Greater than 75 years of age
• Unable or not willing to provide informed consent
• Need for nursing care
• Currently working nightshift

30 volunteers were invited to participate in this study. 15 participants will be selected among healthy volunteers, by advertising to the general public. The remaining 15 will be among patients with diagnosed sleep apnea who visit SleepMetrics clinic as part of their routine treatment.