Beverly, I am using both Fitday and my old Diet Sleuth.

Fitday takes exactly three times as long to enter a selection but has a
nicer interface and is great if you want to take a mental magnifying
glass to every aspect of a diet.

Not spontaneous but excellent for awareness of where calories come and
go when exercise is used and intake of food monitored.

I'll ask my nine year old to post a message for your granddaughter on
her impressions after one week on the diet.

Today my daughter said the girls were having pizza for lunch. instead
of being a cop, i suggested they opt for thin crust and no double
cheese and enter it in their journals.