UIAppFonts is an Info.plist key used by an iOS app to specify custom font files included in the bundle.
UIAppFonts
(also known as "Fonts provided by application") is an Info.plist
key used by an iOS app to specify custom fonts included in the bundle. It gives an array of font file names (as strings) that should be loaded by the OS for use in the app.
Note: custom fonts are only supported in iOS 3.2+.
For more information, see the Apple Documentation for the UIAppFonts
key.