On an iPhone, the CarValet app is typically used in portrait, so information usually flows from top to bottom. On an iPad, the same is true for the master/menu view of a split view controller, but not for the detail view. The iPad is wider than the iPhone, no matter what the iPad orientation, and this opens up the possibility of using horizontal grouping of data items.
As with any other screen, there are many possible designs, depending on what you are trying to achieve. These are the goals:
Visually group related information.
Make the most relevant information easy to find.
Easily enable both reading ...