IScale

$4.99

This app ignores the exercise angle and only summarizes food data in terms of calories. It does, however, show your daily calorie count in the lower-left corner and superimposed over the app icon on the iPhone home screen.

This app's strength is that it pushes the meal and planning angle, even so far as to incorporating a shopping list into the app.

This is the home screen of the app, showing the "meals" and "foods" that have been consumed today. Note that a meal is composed of individual foods. The calorie count for the day is shown in the lower-left corner. The "add to shopping list" option gives a short list of the foods that were consumed today, which seems an odd way to do things unless it is assumed that the user is going to a previous day in order to buy ingredients to have the same meal in the future.

This is the meal screen -- in this case the screen was reached from the "add meal" button, so clicking on the meal adds the meal to the current day's journal. If the screen is reached from the menu button, then clicking on it provides a more detailed view of the meal.