It is true there are quite a few. I haven't done an exhaustive analysis. I have tried using a few of the more popular ones like MyFitnessPal and Cron-o-meter, and was dissatisfied with them. They all seem to work the same way. I had an idea of how I thought it should be done and went looking for a program that did that. I was unable to find what I wanted, which is why I'm looking at making my own. Since finding this site I combed through the 54 food tracking apps listed in the guide, and still none of them have taken my approach.
That said, I can see the advantage of a more detailed competitive analysis. I'll add one to my business plan. Thanks for that.