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).