ROL Assistant is a free mobile application with useful calculationtools for the refining engineer and displays market prices from theRefiningOnline.com site. The main features of this software aresummarized below: ROL Mkt.: Displays market prices from theRefiningOnline.com site. Unit: Conversion calculations for Length,Area, Volume, Mass, Density, Pressure, Energy, Power, Temperature,Flow Rate, Viscosity, Specific Energy, Heat Flux, Heat TransferCoefficient, Thermal Conductivity... Steam: Enthalpy, Density, HeatCapacity, Viscosity, Thermal Conductivity of saturated steam,water, and superheated steam properties. Press. Drop: Single phaseline pressure drop calculation for different pipe sizes andmaterials in English or Metric units.