Online Mccabe Thiele Theoretical Plates Calculator for distillation column design

This is the link of an online application for finding out the theoretical number of plates for distillation column:
enggaze.com/applications/mccabe-thiele-calculator/
Steps to find out the number of plates:

• In the first step, the application asks you to define a Data Source. There are three options available viz.: Available Systems, Relative volatitliy and raw VLE data.
  
• Available System: These are a few commonly used systems which are already present there in the application. You just have to select the appropriate System.
  
• Relative Volatiltiy: Enter a value for the relative volatility. The application will use this value to form the VLE curve.
  
• Raw VLE data: If you have VLE data points of the system which you wish to use. Just enter the Points in the specified format. You can control the number of data points you have to enter. The application will fit the data for you after clicking on the "Fit Data" button. Choose the appropriate polynomial degree for a good data fit. Remember that the polynomial degree should be less than the number of data points you have entered.
  
• In the second and the final step, the application will ask you various parameters required to draw the Mccabe Thiele Diagram.
  
• After pressing the finish button, the application will give you the result in form of a Mccabe Thiele Diagram which can be saved as an image to your system. The application will give you the number of Theoretical Trays and the Feed Tray.