Free gift every x Plugin

1. Every 20 dollars you spend, you get a free specified item.

Can they choose this item, or will the item be added to their cart automatically? Can they refuse to receive the item?

2. If you buy 3 items from category x (e.g. shirt), you get the 4th item free.
— In other words, if I buy 3 shirts, I get the 4th one free (the cheapest one is the free one).

This can be done with the Dynamic Pricing plugin. In the documentation, you can find an example “buy one, get one free”. If you adjust that to “buy 3, get 1 free”, that should work: https://docs.woocommerce.com/document/woocommerce-dynamic-pricing/#example-buy-one-get-one-free

Hi there,

1. The item is automatically added to their cart, they could remove the item if they wanted to.

2. I’ll check it out, thanks.

> Every 20 dollars you spend, you get a free specified item.

I don’t know of any WooCommerce plugins that will automatically add a product to the cart. You’ll need to have some custom code written to make it work.