According to Apple’s application guidelines, a tablet (iPad) application should not hide the status bar while a handheld (iPhone) application should hide status bar. The above dimensions are assuming that you have chosen to follow this recommendation. If you choose a different path, then you should increase or decrease the image height based on the size of the status bar. An iPhone app should include one launch image in portrait orientation; an iPad app should include one launch image in portrait orientation and one launch image in landscape orientation. This means that not all formats listed above are required. iOS Splash Screens
According to Apple’s application guidelines, a tablet (iPad) application should not hide the status bar while a handheld (iPhone) application should hide status bar. The above dimensions are assuming that you have chosen to follow this recommendation. If you choose a different path, then you should increase or decrease the image height based on the size of the status bar. An iPhone app should include one launch image in portrait orientation; an iPad app should include one launch image in portrait orientation and one launch image in landscape orientation. This means that not all formats listed above are required. 
