Cognitive-Behavioral Stress Management Device for the Treatment of Anxiety and Depressive Symptoms in Patients With Stage I-III Breast or Lung Cancer

Inclusion Criteria: * Age 18 years or older * Diagnosis of stage I-III breast cancer or stage I-III non-small cell lung cancer * Currently in active treatment or have completed initial cancer directed treatments (surgery, radiation, chemotherapy) within the past 3 months * Patients showing moderate anxiety (General Anxiety Disorder-7 Questionnaire \[GAD-7\] \> 10) or mild depression (Patient Health Questionnaire depression scale \[PHQ-8\] score 5-11) * Fluent in English * Has access to smartphone or tablet capable of running iOS or Android software Exclusion Criteria: * Previous history of cancer * \< 2-year (yr) survival prognosis * Endorses thoughts of self-harm on question 9 of the Patient Health Questionnaire-9 (PHQ-9) (any score \> 0) * Currently participating in investigative behavioral intervention trial for treatment of anxiety or depression * Participant is unable to complete training, cognitive deficits, major psychiatric conditions, psycho-social conditions; lack of access to internet accessible device; other social conditions that would interfere with adherence to self-directed care, such that in investigator's opinion the participant would be unable to complete the study * Recently completed use of Blue Note Therapeutics COVID Cancer Care Program or other Blue Note Therapeutics-sponsored study * Planning to seek other psychosocial support services while participating in this study