WhatTheFont is a font identifying app for the iphone. The basic idea is
to snap a picture of the font you are trying to figure out and let app
do the rest. Pictures are taken, uploaded and then analyzed by the
program. The user then is shown pieces of the photo each trying to
identify a different character. Once the characters have been
identified, the user can click submit and the app will list suggestions
for you.

When this app did work, it worked great. It offered dead on
suggestions that really were useful in showing me a font. But with the
limitations of the iphone's 2-megapixel camera that lacks an
auto-focus, blurry text became a hassle for this program and almost
rendered it useless in day to day situations. Small text was nearly
impossible for the app to recognize as it was too blurry for the app to
analyze. This only seemed to work on fonts that were extremely large
and worked usually on only one or two characters at a time.

At the time
of this review, WhatTheFont was available free from the app store. It's
definitely an interesting concept and would prove useful to designers
and typographers alike if it would work frequently. But in my tests,
the app failed to identify most of my text and was too much of a hassle
when it did. It'd be quicker to start memorizing the types of fonts
than to get this app to do it for you.