Sleep disorders decrease the quality of sleep for affected individuals, potentially leading to serious, negative health effects. Therefore, it is essential to promptly diagnose these disorders and subsequently monitor their progression. The diagnosis of sleep disorders involves the examination of sleep, categorized into distinct stages, with polysomnography (PSG) currently considered the gold standard for assessment. However, PSG has limitations: it is expensive, time-consuming, complicated to operate, obtrusive, and usually only performed on a single night. One possible solution to these limitations is to leverage commercially available wearable and contactless devices that are already capable of providing sleep stages classification. These devices are affordable, easy to use, comfortable, and suitable for multiple nights of use.