Psychological Intervention Using Smartphone Technology to Alleviate Malignant Pain

Cohort Inclusion Criteria: * Age ≥ 18 years * Patient diagnosed with an active cancer diagnosis (locally advanced solid tumor malignancy, multiple myeloma, or other advanced hematologic malignancy), either undergoing active treatment or receiving treatment for an advanced cancer or are receiving supportive care * Chronic pain related to cancer or treatment (\> pain score of 4) * Has an active prescription for at least one opioid medication to treat their cancer pain (i.e. not for post-surgical pain) * Completed baseline survey Cohort Exclusion Criteria: * Patients in survivorship: patients who have completed their treatment regimens, are not actively receiving treatment for an advanced cancer, or have a cancer that is in remission * Cognitive impairment that would interfere with study participation, as judged by treating clinician * Inability to speak English (the intervention has not yet been translated to Spanish) * Enrolled in hospice * Currently hospitalized * Use of transmucosal fentanyl, given safety concerns and ongoing risk mitigation program required to prescribe these (TIRF REMS) * Pain primarily related to a recent surgery (within the last 2 weeks) We will exclude adults who are unable to consent, individuals who are not yet adults (infants, children, teenagers), pregnant women, and prisoners.