An activity meter has an activity amount acquisition unit that acquires an amount of physical activity of a user. The activity meter acquires a first index relating to a difference between target calories burned for a unit period and computed calories burned that are computed from the amount of activity acquired by the activity amount acquisition unit in the unit period, and acquires a second index relating to a difference between a target value representing a body composition and a measurement value representing a body composition that is measured for the user. Information on an evaluation of the amount of activity based on the first index and second index that have been acquired is output.
