This app was removed from the App Store.
iOS Universal Productivity
Fontcase Viewer shows high-resolution previews of the fonts you select in Fontcase for Mac.
Note that this is a companion app to the Mac version and useless without it.
The iPhone's Retina display is the perfect way to examine characters in detail. Hold your iPhone in Portrait mode to see a body text rendering of the font, or in Landscape mode to see a display rendering.
On your iPad you will see an overview of the font, rendering both title, body and the main glyphs supported by the font.