How do I track bodyfat?

A Withings scale syncs weight and bodyfat automatically. Any other scale works by logging the numbers by hand, or through Apple Health if it writes there. The guide below covers how to measure it well and what to expect week to week.

Which matters more, weight or bodyfat?

Bodyfat. Scale weight swings a kilogram or more in a day with water, salt and carbohydrate, which is why the app trends weight instead of reading one morning. Losing fat while keeping muscle is the goal, and bodyfat percent is the number that shows it.

What does the coach do for weight loss?

It reads your food, activity and weight trend together, sets protein and calorie targets, and picks one focus each week so you are not changing everything at once. When the trend stalls, it says why: sleep, weekends, portions or training usually explain it.