The calculation of a member's default calories in goals & preferences in the app uses the Harris-Benedict formula. This calculates a person's basal metabolic rate (BMR), indicating how many calories their body needs to function at rest. The formula considers factors such as age, weight, height and sex.
After calculating BMR, it is multiplied by an activity factor based on the person's physical activity level. This gives the total calories needed to maintain their current weight. You can then adjust this number for weight loss, weight gain or maintenance, depending on the member's specific goals.