Companion for CAR-T Web App During Chimeric Antigen Receptor T-cell Therapy

Inclusion Criteria: * Diagnosis of a hematologic malignancy (including any plasma cell dyscrasia, any type of lymphoma, or any type of leukemia). * Planned receipt of an FDA-approved CAR-T therapy at University of California, San Francisco (UCSF) as standard of care. * Patient proficiency in spoken and written English. * Caregiver proficiency in spoken and written English. * Age \>= 18 years old Exclusion Criteria: * FDA-approved CAR-T therapy being administered as part of a prospective industry-sponsored trial, for example registrational trials of CAR-T therapy versus salvage chemotherapy or CAR-T therapy as an off-label line of therapy. \*However, patients who receive an FDA-approved CAR-T therapy through an Expanded Access Program for non-conforming products (or any observational, non-interventional analysis of CAR-T products) are eligible. * Lack of ownership of a personal computing device, tablet device, or smartphone. * Refusal of patient and/or caregiver to sign up for a UCSF MyChart account. \*Participants and caregivers who do not have a MyChart account at enrollment but are willing to create one will receive assistance from the study team to do so. * Any serious and/or unstable pre-existing medical, psychiatric, or other condition that could - in the opinion of the study's Principal Investigator (PI) - interfere with provision of informed consent or compliance with study procedures.