Inclusion criteria:  Man or woman aged between 18 to 80 years old Patient referred for a suspicion of OSA Patient having a smartphone and internet connection at home and able to use a mobile application Patient affiliated to the social security system  Main exclusion criteria:  Patient with a previous sleep test performed within 5 years of inclusion Patient previously treated for OSA within 5 years of inclusion Patient suffering from severe chronic obstructive or restrictive pulmonary disease with or without oxygen at the discretion of the investigator Patient refusing to shave his beard that could prevent him to wear the device on the chin