The iPhone 5 is finally out and the Daily Devotional apps by Tap Tap Studio has been optimized for the iPhone 5 (4 inches) 1136×640 resolution display. The iPhone 4s/4 comes with a 960×640 (3.5 inches) resolution display.
You can get the iPhone 5 optimized daily devotional apps from the iTunes Store. At the moment only the paid apps have been optimized for the iPhone 5. The free apps are being optimized and should be available by next month.