There is different type of iPad applications.
Productivity application: - These apps are usually goal-oriented, i.e., users usually have clear goals when using them. Efficient manipulation of information, direct/hierarchical navigation, and uncluttered/learnable user interface are considered top traits of these apps.
Utility application: - These apps usually have a flat information hierarchy which takes users right to the main application screen. Visual appeal, metaphors and intuitive design are desirable in these apps..
Content Oriented application: - Apps with the main purpose of providing news, entertainment or other types of media content. Browsing-oriented, app users look for content that interest them through berry-picking among headlines. Scan-able content, relational navigation and categorized architecture are common in these apps