Convert Units is a thunderingly amazing conversion tool !
This is the paid version where there are no ads.
-Converts: Length, weight ,speed, area, time, pressure, volume, power, fuel, temperature, data and currency
-Update currencies automatically, manually, once a day or every time on app launch
-A mind boggling 160 Currencies to choose from
-For the iPad: Multitasking enabled so you can do conversions at the same time while you are on another app like safari
-Alphabetical side quick links gets you to your unit fast without having to scroll the entire list
-Conveniently launch categories at start up instead of pressing them all the time.
e.g. if you only use the length category you can choose to launch it at start up immediately instead of pressing the length button every time.
-Beautiful dark design with bold fonts for practical viewing
-Exceptional Accuracy by choosing where you can choose the number of digits to show:
e.g. 0.030333 has 5 significant digits, by choosing 3 significant digits you get 0.0303 instead.
-Allows you to choose if you want to round up results
e.g. 0.1245 rounded up to 3 significant digits will give 0.125
-Disable Sound and Rotation.