Your goal sets your numbers
When you start, Yumi asks for your goal, your activity level and how you like to eat. From that it builds a daily calorie target and a split of protein, carbs and fat. Change your goal later and the targets change with it. If you connect Apple Health or Health Connect, your activity and weight flow in too, so the numbers reflect how you actually move.
Want a number before you install?
Try the free calorie calculator and macro calculator. They use the same kind of standard equations and run entirely in your browser.