Is there a way to add product recommendation to a service?

You can add product recommendations with Cojilio Add-Ons. Add-Ons are recommended up-sells/upgrades to a service, and can be a service or a retail product.

Here is a Help Guide: Create an Add-On

For example: A client is booking a Haircut, and the 2 recommended Add-Ons are “Premium Hair Mask $20 (adds 10 mins to appointment time)” and “Charcoal Shampoo $55 (adds 0 mins to appointment time)"