We accept orders for CathCAD® Software licenses as follows:

  • In order to expedite orders you may place an order for a CathCAD® Software license by clicking on the following Shopify store link: Purchase CathCAD® Software license
  • We can issue an electronic invoice that you can pay with your Credit Card via the Intuit Merchants Payment Center (SSL secured)
  • We can issue your company a formal quotation and have your purchasing department place an order with us with Net 30 days payment terms

Discover the advantages of using CathCAD®.



We support a full featured demo program of the CathCAD® software. This demo program allows the User to execute the Software for approximately two (2) weeks so you can get a good feel and understanding of how the software works and executes. We can typically get a new User account up and running in about 24 hours. 

  • Email sales@cathcad.com to receive more information about the CathCAD® product offering, request a demo access code, and licensing fees. Emails to this account are routed directly to an iPhone for near instant review and response.

  • For our new customers we offer a thirty day/no questions asked/cancel for any reason provision with your first year CathCAD® Software license.

  • Want to talk to a real human being? Call us at (210) 380-9890.

Discover the advantages of using CathCAD®.


Ron Roth, Ph.D.

ronrothDr. Roth received his Ph.D. in Mechanical Engineering from the George W. Woodruff School of Mechanical Engineering at Georgia Tech. His educational background includes majors in Applied Control Theory, Dynamics/Vibrations, and Optimization Theory and with minors in Electromagnetics, Mechanics of Materials, and Mathematics. 

Dr. Roth is currently the Principal for RT Automation. RTA has released products including CathCAD®, MeasureOD®, Measure2D®, and the MCerberus® HVAC monitoring system. 

Dr. Roth is also the codeveloper of the RD PowerPro software system which is utilized by Registered Dietitians for the development and management of their client’s diets.