A habit used to be a plain check-off: done or not, with no room for how much. A habit can now track a measurable target. Pick a typed unit (Count, Calories, Distance, Time, Water, Steps, Pages, Chapters, or a custom one), set a target value, and choose the period it resets over: day, week, month, or year. Turn on "Enter value" to log the exact amount each time instead of counting up by one.