Basal metabolic rate and daily needs, plus the targets for losing fat or gaining mass. Five fields, no sign-up.
Your basal metabolic rate is what you burn doing nothing: breathing, staying warm, thinking. It is calculated with Mifflin-St Jeor, the formula with the lowest error across the general population. Enter a body fat percentage and we switch to Katch-McArdle, which starts from lean mass and is more accurate for people who have trained for a while.
Daily needs are that figure multiplied by how much you move (from 1.2 if you sit all day to 1.9 if you train twice a day). From there: −20% to lose fat, +10% to gain. These are starting points to correct after two weeks by watching the scale, not verdicts.
Estimates, for information only: they do not replace a doctor or a dietitian, and should not be used during pregnancy, while breastfeeding, or with a medical condition.
GiFit works this target out from your profile and subtracts what you eat, with barcode scanning and your country's food catalogue. Calories burned training go back into the day's budget. No account, and the diary never leaves your phone.