How to Add a Stock Counter in Shopify Horizon Theme

A stock counter shows shoppers how many units are left — a native Horizon block tied to your actual Shopify inventory numbers, not a fake countdown.

Steps

1. In your Shopify admin, go to Online Store > Themes and click Customize on Horizon.
2. Open a product page and select the Product information section.
3. Click Add block and choose Stock counter (or similarly named inventory block).
4. Set the threshold — for example, only show the counter when stock drops below a certain number, so it doesn't display for well-stocked items.
5. Click Save.

Because this pulls from real inventory tracking, it only works correctly on products where Track quantity is turned on under that product's inventory settings.