A portable device which utilizes a method for tracking consumption of food calories, carbohydrates, fats, or proteins using a cell phone, personal data assistant, or hand held device. The user can record food intake; calculate basal metabolic rate; daily caloric needs; monitor calories, carbohydrates, protein or fats; and provide current metabolic state with corresponding exercise for weight control. The user can enter a timed physical activity to determine caloric balance between calories eaten and calories burned. Data is displayed for 7, 14, or 30 days, and can be Emailed to and synchronized with the user's personal computer or internet server