Can a phone app help cancer survivors sleep better?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: FOR QUALITATIVE INTERVIEWS PRE-TEST * HCT survivors: Potentially eligible patients will be approached in person during a routine outpatient appointment at Moffitt Cancer Center or via telephone. * Additional eligibility criteria for HCT survivors will require that participants have undergone an allogeneic HCT within the previous 6 months - 2 years for a hematologic malignancy and be reporting clinically significant sleep disturbance (≥ 4 on a scale of 0 - 10). * Caregivers of HCT survivors: Patient participants will be asked to nominate and provide contact information for the person who was their primary caregiver before, during, or after their HCT hospitalization. * Adults ≥ 18 years old * Able to speak and read English * Able to provide informed consent * Have no documented or observable severe and untreated neurological or psychiatric disorders that would preclude participation (e.g., psychosis). * Clinicians: Eligible clinicians will be oncologists, nurses, or other clinicians at the Moffitt Cancer Center Blood and Marrow Transplant Program. FOR INTERVENTION GROUPS * Are ≥18 years of age * Have been diagnosed with a hematologic malignancy * Were discharged after allogeneic HCT within the previous 110 days (to allow for those who return to clinic within approximately 2 weeks of their planned 90-day clinic visit) * Are experiencing clinically significant sleep disturbance * Have never been diagnosed with nor are at high risk of sleep disorders that are unlikely to be ameliorated with behavioral treatment (e.g., obstructive sleep apnea, restless leg syndrome) as assessed using the Duke Structured Interview for Sleep Disorders * Are able to sign informed consent * Do not have any untreated or severe psychiatric or neurological disorders or other disabilities that would impair their ability to participate in this study. Exclusion Criteria: * Do not meet Inclusion Criteria