iFonts is a simple way to see all of the iOS fonts. Share the list via email with your designer or developer, or enter text to see it displayed in any of the 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 included in iOS.
App Store link
Email josh@roadfiresoftware.com or tweet @jtbrown with questions or feature requests.
