For adding a new upsell product rule.

First add,

The product that you need to upsell.

In the display settings you can add 

Product Title

The sub title

The text for call to action.

The call out banner as well as callout text.

The options for variant picker, discount label, quantity selector and product discount are provided. You can choose whether you want to opt for the above conditions or not.

This application provides a number of rules right from type of products to total value of cart,shipping orders as well as customers.