Time Restricted Eating for WeIght LoSs MainTenance-2

Inclusion Criteria: * ≥5% non-surgical weight loss in the last 3 mos; * current BMI 20.5-45 mg/kg2; * between the ages 25 to 65 years old; * own a smartphone or willing to use a smartphone if provided for self-monitoring. For in-person screening, eligible participants will provide signed informed consent and have their temporal eating patterns measured. Exclusion Criteria: * pregnant, trying to get pregnant or breastfeeding; * previous or planned bariatric surgery; * previous or current history of eating disorder; * ongoing participation in another weight-management research study; * continued participation in a weight loss program other than the proposed study; * currently on appetite suppressants; * currently following intermittent fasting; or skipping meals; * eating window \<11h 59min/day; * perform overnight shift work more than once a week; * work that includes travel across one or more time zones; * taking medications that affect body weight or would preclude TRE; * unable or unwilling to provide informed consent; * unable to participate meaningfully in the intervention (e.g., uncorrected sight and hearing impairment); * unwilling to accept randomization assignment; * unable to log at least 2 meals into the smartphone app for 70% (\~20 days) during of the run-in period; * have type 1 or type 2 diabetes, or other conditions that would preclude restricted eating windows; * narcolepsy, * \>2.5 kg additional weight loss during run-in phase (weight regain is not an exclusion criteria); * is non-English speaking (the mCC app is currently only available in English).