Which feedback module for opencart will allow you to complete the task?

Question

PHP

Good afternoon, you need a module to automatically send an e-mail to the buyer after a certain time after changing the status of the order to Sent, for example.
It is necessary in order to offer the person who bought it to write a review about the product or about the work of the store.
I found a paid module here:
www.opencart.com/index.php?route=extension/extensi...
Question: Are there analogues? Has anyone implemented something like this?
Maybe someone has a crooked or practical advice, I will be grateful for any help.