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I am designing a mobile app for both ipad and iphone. I have a navigation bar which has several buttons next to each other and an action bar that has several buttons next to each other. Is there a standard amount of space that should be between these 32x32 buttons so that the user doesn't accidentally have their thumb push the button next to it?

I can't find any data anywhere saying the right amount of padding there.

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Your interface sounds fairly busy. Are you trying to take a pc interface and put it into a mobile or tablet version? If so, you should consider rethinking the interface by designing it as if there were no pc version.

  • Only on the tablet would the action bar and navigation bar appear on the same page. We actually have limited the number of actions from the pc version to the mobile version. There are 3 action buttons on the navigation bar and right now 2 actions on the action toolbar. Just wanted to know how far apart these actions should be from each other. – leex1080 Sep 14 '11 at 13:24
  • You should take a look at the Apple HIG, or the Yahoo one. – JohnGB Sep 16 '11 at 12:22
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Not sure. I would produce some mock-ups and test it, along with looking at apps that are already out there. Do some comparisons.

Here is a good list of guidelines for mobile and tablet. I havent read them in depth:

http://www.mobilexweb.com/blog/ui-guidelines-mobile-tablet-design

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