Inclusion Criteria:  Age >= 18 years Breast cancer (BC) survivors (pathologically proven ductal carcinoma in situ or stage I-III invasive BC and completed primary breast surgery, radiation, chemotherapy >= 21 days prior to enrollment) Body mass index (BMI) >= 25 kg/m^2 Endocrine and HER2- directed therapy is permitted Have access to a mobile electronic device Motivated to lose weight (readiness to change assessment)  Exclusion Criteria:  Stage IV BC Have not completed definitive locoregional therapy (surgery +/- radiation therapy) Participating in another weight loss clinical trial Not able to speak and understand English Cognitive impairment which would interfere with performance of DD task or EFT procedures