I'm developing an iPhone app. This app is really simple: a user can search if (for example) an product contains milk (maybe you are allergic to it) and give you a feedback (you can eat, or you can't eat it).
I had thought to divide the app into 3 parts:
While in Brands and Categories I know how I should show it, but in Home I don't know if it's better show some link to the top categories, or a list of all products.
I had done a mockups with Balsamiq Mockups that you can see here (click to enlarge):
Please can you give some feedback and suggest a better organization method? Is it better to show the top (common) categories or all products listing in home (all products can be over 5k also)?