Lifesum’s calculations are based on the Mifflin - St Jeor equation and activity level. This equation is used in clinical settings to determine induviduals’ caloric needs based on their basal metabolic rate (BMR) and activity level. Since it is one of the most reliable methods to calculate with the user information we have we have decided to use it for our calculations:

BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) + 5 (man)
BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) - 161 (woman) 

The calorie goal is calculated depending on the plan the user is choosing (gain, lose, maintain/be healthy).

 

Also: the calorie goal will automatically change when you lose/gain weight over time and are following the calorie goal calculated by the app.

Please note that once you have set a calorie target yourself under Settings -> Personal details, the target will remain static and will not change. To change this, you will need to go to the settings again and then press ‘Reset’, after which the app will then automatically recalculate your calorie target based on the personalised details.

Also note that if you import your exercise data from Apple Health or Health Connect, the calorie target will automatically be lowered before the exercise is added. This is because calories burned from your physical activities during the day are added to your daily activity goal.