Inclusion Criteria:

• * Index Participant:
• 1. Black race or Hispanic ethnicity
• 2. Male or Female 18 years of age or older
• 3. Calculated BMI \> 30kg/m2 from objectively measured height and weight by study staff
• 4. Access \& willingness to use program food intake app via home computer or a smartphone
• 5. Ability to identify at least one adult social network member who will participate in the study
• * Social Network Member:
• 1. Male or Female 18 years of age or older
• 2. Access to the internet or a smartphone

Exclusion Criteria:

• * Index Participant:
• 1. Active enrollment in a weight-loss program, use of weight-loss medications, or planning weight-loss surgery
• 2. Advanced medical illness, dementia, hospitalization, injury, or pregnancy that inhibits regular physical activity
• 3. Contraindications to exercise based on the Physical Activity Readiness Questionnaire or lack of clearance from a health care provider
• 4. Unresolved Food insecurity
• 5. Speaks a language other than English or Spanish
• * Social Network Member:
• 1. Speaks a language other than English or Spanish