Wearable devices are an emerging trend in different subject areas. In the market there is a wide range of wearable devices for fitness, but researches in healthcare areas are rapidly increasing. The spread of these devices introduces the possibility to have patient monitoring directly from home. Indeed, in some instances like Obstructive Sleeping Apnea (OSA), the patient is forced to stay in the hospital for a long period in order to monitor, for example, its heart rate. The scope of hospitalization is to collect data, while the analysis is performed when the patient is no more required to be in the hospital.