VisConvert - Conversion app for iPhone and iPad
Sleek and Simple Conversion Calculator - allow to open multiple converters at the same time.
Category to convert:
1) Length
2) Mass
3) Volume
4) Temperature
5) Area
6) Time
7) Plane Angle
8) Pressure
9) Frequency
10) Energy
11) Speed
12) Fuel Economy
13) Data Transfer
14) Digital Storage Conversion