What plugin to create online calculators to choose?

What plugin to create online calculators to choose?

I am engaged in the development of sites on the Wordpress control system. He began to notice that customers very often ask me to create an online calculator for them, especially often e-commerce sites, various online stores, sites selling services, etc. In most cases, you need to create a calculator for a short time, and there are a lot of requirements.

I began to look for plug-ins, so that at least a small part of the functions could be assigned to the plugin and automate the process of calculator development, I myself only have to do complex functions. In the search I found the following most suitable plugins:

• https://wordpress.org/plugins/ucalc/
• https://wordpress.org/plugins/woo-price-calculator/
• https://wordpress.org/plugins/calculated-fields-form/
  

Tell me, have you used these plugins? Maybe you used some other plugins that you can recommend?