| http://www.w3.org/ns/prov#value | - The iPhone app has a gorgeous, customizable user interface, and comes with 10 conversion types in using length, mass, area, currency, energy, volume, temperature, data, time, and speed, while using its category function you can easily find out the conversion type you need to convert, and the slide control allows you to quickly switch units or areas, moreover, every unit features detailed descripti
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