iFonts is a simple way to see what fonts are available for iOS. Share the list via email with your designer or developer, or enter text to see it displayed in any of the available fonts. The list is guaranteed to be correct - it uses public APIs to determine what fonts are installed - so you don't have to worry about whether that list you found on the web is right or not. iFonts doesn't add any new fonts to your device, and it doesn't send messages in different fonts. It just shows you what fonts are at your disposal for your next app.
"This app is pretty simple, but it's extremely handy as a reference for iOS developers, since there seems to be no other way to get this information."
"As a web designer, it's nice to see what fonts I have available to me when building sites for Apple mobile products."