Font Box also shows detailed informations about a font's metrics as well as its availability in previous versions of iOS.
You can choose between numerous different sample texts and pangrams to check the availability of special characters used in different languages, for example german umlauts or french diacritics.
A general survey of all fonts shipped since iPhoneOS 2.1 including their availability in various other iOS versions is also available. This makes FontBox a great help for searching suitable fonts when developing new iOS apps.
If you find a bug in this app, please report it to the bug tracker so I can fix it as soon as possible. You can find a link to the bug tracker on the support website