erickcouto/react-native-classified ? reverse-engineered prompt

Build me a React Native app that looks like the OLX Brazil classifieds home screen, with a clean marketplace feel and the same kind of layout from the screenshots. I want it to have simple navigation between screens, styled components for the visual design, Native Base for UI pieces, and some smooth animated touches so it feels polished.

Make it work on both Android and iPhone, and keep the structure easy to understand so I can tweak the colors, text, and content later. Use placeholder data if needed, but the result should feel like a real classifieds app with categories, listings, and a nice header area. If you need to check current docs for any library details, go ahead and look them up online.