For free, myfitnesspal.com enables the user to log in the number of calories they are eating. It can be used for weight loss and you can print out your results and review them with your health care professional
I have had several people bring me their results, and we are able to fine tune their eating habits and make recommendations based on their printouts.
You can also log in your activity and water.
Summaries include, calories from carbohydrates, protein, fat and amount of sodium in the diet.