We know you want your visuals to put an impact to your customers so we will help you sort it out. KioskBuddy does not have a resolution requirement for the idle screen, and this is actually dependent on the iPad screen size.
For a more detailed comparison of all the Apple iPad screen sizes, including the resolution and dimensions, visit the Apple iPad Size Chart. This comprehensive chart gives you an in-depth look at the specifications of each iPad model to help you determine what dimensions your iPad has and what resolution is best to use.