This site was built on the same basic design as MSUA and my motivation was to scratch an itch. I simply felt that using a spreadsheet to track my own nutrient intake, weight and such things was just too clumsy. And thus MSCC was born.
Mludd's Simple Calorie Counter, makes for a neat four letter acronym, just like MSUA. Which is fitting since it's built on the MSUA code.