15 Tsolakou, E., Leonidis, A., Kouroumalis, V., Korozi, M., Antona, M., & Stephanidis, C. (2020, April) HypnOS: A Sleep Monitoring and Recommendation System to Improve Sleep Hygiene in Intelligent Homes. In International Conference on Human Interaction and Emerging Technologies (pp. 433-439). Springer, Cham. 2020 Sleep is important for many vital functions. Unfortunately, many people suffer from sleep-related problems, which have negative consequences on sleep quality and therefore on quality of life. Considering the important health benefits of a good night’s sleep, it is crucial to investigate technological solutions that promote and improve sleep hygiene. To that end, the HypnOS framework for “Intelligent Homes” is introduced, aiming to improve the sleep quality of home residents by monitoring their sleep and providing personalized recommendations to overcome sleep-related issues. It describes the design process that was followed, presents its functionality, reports the findings of an expert-based evaluation of the HypnOS mobile app and discusses future plans. https://link.springer.com/chapter/10.1007/978-3-030-44267-5_65