Time-Restricted Eating to Address Persistent Cancer-Related Fatigue

Inclusion Criteria: * Have completed adjuvant chemotherapy, surgery, and/or radiation for cancer, including chemotherapy for hematologic neoplasms, at least 2 months and not more than 2 years prior to enrolling, * Have a baseline level of fatigue, as determined by reporting a score of 4 or higher for the question, "In the last week, how bad was your worst fatigue on a scale from 0-10?" * Be able to speak and/or read and write in English, * Be at least 18 years old, * Own a smartphone, * Be willing and able to adhere to study procedures, including use of a smartphone app, and * Be able to provide informed consent. Exclusion Criteria: * Already eat all their food within a window that is 10 h or shorter most (6/7) days of the week, * Be underweight, as defined as a body mass index ≤18.5 kg/m2, * Have surgery planned during the study duration, * Have any contraindications to the proposed nutrition intervention as identified by their medical provider, their designee, or the study team (e.g., type 1 diabetes, risk for hypoglycemia, medication requirements, pregnancy, breastfeeding, recent history of an eating disorder), * Be taking insulin, or * Be on enteral or parenteral nutrition.