iPhone app for caterers

I have been checking out iPhone apps that might be usable for catering but all I find are ones that have recipes and cooking tips. What I am looking for is an app where I can put in my recipes, my cooking methods/times per product plus my menu and current cost per menu item and serving sizes for entree's and sides and how much to cook for various size events. I currently have all this info in hardback booklet form but would rather have it on the iPhone. I also want to be able to input shopping list per source.

Has anyone seen anything that comes close to these requirements?

p.s. sorry for the run-on sentences.

Which one do you recommend, the more $9.99 or the $16.99? I don't see much difference but I am not clear about the differences.