aRhoAIR is a state point psychrometric calculator that offers a range of air properties calculations, including air density, specific heat, various vapor pressure, dew point temperature, moisture content, and enthalpy. Developed by a professional engineer, it is designed to replace the traditional psychrometric chart and provide users with a simple and effective way to find air properties.

One of the key features of aRhoAIR is its input options. Users can input either Relative Humidity (RH) or Wet Bulb Temperature (Twb) and choose between Z (altitude) or P (pressure) with units selection (Pa, hPa, kPa, mbar, bar, in.Hg, psi, atm). The calculation formulation is based on ASHRAE guidelines and the app supports both SI and IP units.

Another useful feature of aRhoAIR is its built-in result file viewer, which allows users to save their results for future reference. Overall, aRhoAIR is a comprehensive and easy-to-use tool for anyone who needs to calculate air properties and is available for free on the Android platform.