This is a simple and easy to use calorie counter app. Other apps require you to search through a database of food, select the correct one, then enter the serving size just to log calories. This app allows you to just press "add" or "subtract" and enter the number of calories, then save.
Your daily calories are automatically saved to your history after each day, and provide you with your average over the past week. If you forgot to log them on a day, you can go back and edit the number of calories. You can also change your calorie goal whenever you want, and it will be saved too.