FAMily-centered WEight Loss for Black Adults (FAM WEL B-ing)

Inclusion Criteria: * self-identified as Black or African American (Index participant) * BMI equal to greater than 30 kg/m\^2 (Index); BMI equal to greater than 27.5 kg/m\^2 (family partner) * have a partner/family member willing to enroll in the study and must share a mutual goal of achieving weight loss * English speaking * ages 18-75 * any gender * have access to and be able to use a smartphone, tablet, or computer that has web-access (this is required for data collection and some program components being tested) Exclusion Criteria: * participation in an intensive weight loss program (more than 12 visits) in the prior 6 months * type 1 diabetes * significant psychiatric illness, defined as depression or other major psychiatric illness not considered reasonably managed by counseling, medication, or both * had bariatric surgery (surgery for weight loss) in the last 2 years or considering bariatric surgery in the next 6 months * using or planning to start medications intentionally for weight loss * are pregnant or planning to get pregnant in the next 6 months * are breastfeeding and less than 2 months postpartum * alcohol or substance abuse, defined as alcohol or substance use that interferes with work activities and/or has had a major negative impact on family/social function, the latter defined as more than 2 episodes per month. * malignancy other than non-melanoma skin cancer, unless considered cured \> 5 years ago. Exceptions include 1) men with localized prostate canc…