Inclusion Criteria:  Being aged 18 years old and over (the app is available for younger users but their data will not be analyzed) having downloaded the app having a smartphone Android or Iphone being located in France having accepted the electronic informed consent  Exclusion Criteria:  having clicked on the "emergency button" (in the app, there is a warning message : this app is not for emergency situations. If you need an urgent psychological support, click here") having downloaded the app but without answering any questionnaire