I need review rating added to my shopify site

Looking for Shopify Expert.

I need review functionality added to my product template for my Shopify site. I would like the same rating system as this website, see link and screenshot. https://www.gearhungry.com/best-squat-racks/

Rating functionality example is at the bottom of the page on the above link.

I would like the review functionality added to this URL here, preferably at the bottom of the page.

https://www.sparksfitness.net/collections/treadmills/products/true-ps100-treadmill

Please send proposal for what you think is fair price.

Thanks