Limited screen size(displays single screen at atime)• less data displayed;• less controls visible and available on a single screen;• smaller buttons;• slow interaction.
BIG screen(displays more data on a singlescreen; allows split-view,a-la 2 screens at a time)• more data displayed;• more controls visible and available on a single screen;• big buttons;• faster interaction.
Portrait - is default andnatural orientation.See the phone in your hand?It is good to support bothorientations.
No default orientation.But, iPad strives to computerdisplay, which is landscapeoriented, which is more naturalfor human perception.Landscape – is more naturalorientation.So it’s a MUST to support both.
Strict and familiar UI behaviorLots of Apps are used for a yearsPeople expect that your application’s UIwill have similar behavior and interaction.
New UI behaviorEven in native apps some controls, behavior,interaction is inconsistent.But,You’ve got a space for creativity to enhanceinteractivity, add some sexy metaphor to interaction,surprise your customers )