1. Outpatients diagnosed with mild to severe unipolar disorder
2. Age ≥ 18 years old
3. Patients willing and able to participate (i.e willing to use the EmoDTx App and having the necessary technical equipment to use it)
4. Patients who read, write and understand French
5. Patients having signed the Patient Informed Consent
You may not be if
1. Patients hospitalized
2. Patients taking more than 75% of the maximal recommended daily dose of benzodiazepines
3. Patients taking more than 75% of the maximal recommended daily dose of antipsychotics
4. Patients taking more than 75% of the maximal recommended daily dose of neuroleptics
5. Patients who did not respond to 10 different pharmacological treatments
6. Patients who attempted suicide within the previous last 6 months and presenting with suicidal ideations
7. Patient presenting with bipolar disorders
8. Patients with a contra-indication to the device under evaluation:
* Severe depression requiring hospitalization
* Schizophrenic disorders according to DSM 5 classification
* Major neurocognitive disorders according to DSM 5 classification
* Illiteracy
* Subject hospitalized in a healthcare or social institution for reasons other than biomedical research or is deprived of freedom by administrative or judicial decision or is placed under guardianship
9. Patients unable to read, write and understand French
10. Patients with no access to a smartphone or a computer with an internet connection
11. Patients who refuse to sign the Patient Informed Consent
12. Patients already participating in another interventional clinical study
