Jewellery price automation

I want to develop Jewellery price automation change of all products price
for my website one of the company create plugins but I don't want to purchase the plugin
I want to create my own system

if you have experience in creating jewelry automatic price then plus for you

check this plugin images

https://ratesbox.com/setting-panel-pro
https://ratesbox.com/
https://auto.ratesbox.com/