"Aesthetic integrity is not a measure of how beautiful an application is. It’s a measure of how well the appearance of the app integrates with its function."
"To determine whether an app follows the principle of consistency, think about these questions: ● Is the application consistent with iOS standards? Does it use system-provided controls, views, and icons correctly? Does it incorporate device features in a reliable way? ● Is the application consistent "
"In an iOS application, people can experience direct manipulation when they: ● Rotate or otherwise move the device to affect onscreen objects ● Use gestures to manipulate onscreen objects ● Can see that their actions have immediate, visible results"
"Applications can respond to every user action with some perceptible change, such as visual changes, explanatory message, subtle animation and sound."
"The most appropriate metaphors suggest a usage or experience without enforcing the limitations of the real-world object or action on which they’re based. For example, people can fill software folders with much more content than would fit in a physical folder. Great metaphors in iOS include: ● Tappin"
"The best apps find the correct balance between giving people the capabilities they helping them avoid dangerous outcomes. Users feel more in control of an app when behaviors and controls are familiar and predictable."
"Great iOS Apps Embrace the Platform and HI Design Principles. Great App Design Begins with Some Clear Definitions. A Great User Experience Is Rooted in Your Attention to Detail. People Expect to Find iOS Technologies in the Apps They Use. All Apps Need at Least Some Custom Artwork."