For years I have been sketching mobile interfaces at scale. Drawing on templates or just scribbing screen-sized boxes onto my notepads before I pick up the pencil. And I liked to check them in context; in the hand, walking around, etc.
As there is no checkbox control in iOS, it always become a bit of an issue on how to mimic that functionality in an app or in a mobile site. The Apple HIG is strangely silent on the issue, other than offering up a segmented control that will only accept a single choice. That's fine for a radio group, but doesn't work for something where you want someone to check a box before continuing, like accepting terms and conditions.
Looking for research or commentary on what makes for a reasonable start up time for an iPad app. Obviously, it depends on the processor (iPad Air i.e. iPad5 will be much faster than an iPad2 or iPad Mini), the connection speed, and the size of the app. But say all of those factors are controlled/averaged...what is the amount of time a normal user would consider normal, reasonable, long, or rediculous to startup an iPad app?
Much of it is the expectation of what the app is giving the user, so I would love to hear how to manage that expectation as well.