Convertbot ★★★★★ ($1.99/ App Store) for the iPhone is without question the best unit converter app available for the iOS. From the makers of the 5 star apps; Calcbot and Tweetbot - Convertbot is also on a standard all app developers should follow. Ingenious user interface anyone can use with visual, audible and control bliss. Converts currency, time, length and 17 other categories with over 500 different units of which can be mixed for conversion. If your in need of any sort of unit converter app, Convertbot is the best choice. Period.
