Inclusion Criteria:  Aged >18-<65 years Presenting mild to moderate depressive symptoms according to Montgomery-Asberg Depression Rating Scale (MADRS score>16 & <34) Currently owning an Android compatible smartphone Fluent in the Spanish language Basic knowledge and skills using information and communication technology Be able to provide written informed consent to participate  Exclusion Criteria:  Severe cognitive and/or physical impairment Cognitive deficit or developmental disorder Current psychotic, melancholic, or catatonic features Drug or alcohol abuse Modification of drug treatment (or its dose) in the last month (or plan for it Beginning of psychological treatment in the last month Beginning of biophysical treatment in the last month BMI >40 Physical disability.