Inclusion Criteria:  Signed written informed consent. Age ≥ 18 years Ability to read and write in Romanian History of histologically or cytologically confirmed breast cancer An interval of < 24 months from histologically or cytologically confirmed breast cancer Ongoing curative cancer treatment Ongoing regular psychoactive medication only accepted if dosage has been stable during the last 3 months Daily access to the Internet by computer and/or smartphone Ability to use a computer and/or smartphone and the internet No participation on any other interventional study or clinical trial  Exclusion Criteria:  Age ≤ 18 years Inability to co-operate and give informed consent Breast cancer not histologically or cytologically confirmed History of other malignancy within the last 5 years Current severe, uncontrolled systemic disease or mental disorder Absence of clinically significant symptoms Parallel ongoing psychological treatment Ongoing regular psychoactive medication if dosage has been changed during the last 3 months No access to the internet Inability to use a computer and/or smartphone and the internet Parallel ongoing participation in other interventional study or clinical trial Assessment by the investigator to be unable or unwilling to comply with the requirements of the protocol