Do you know the difference between a font and a typeface? Do your eyes light up when conversations turn to ems, kerning, and baseline grids? If you answered yes to these questions, then The Typography Manual for the iPhone and iPod Touch is something for you.
The Typography Manual has several useful features and resources for designers, including a visual type anatomy glossary, a font size ruler, an em calculator, and enough content to fill a 60-page book. It has all the essentials of a desk reference in a pocket resource.
Source: Swiss Legacy