Stocky by Shopify is an inventory management app that's included with Shopify POS Pro subscriptions. Stocky helps you manage your inventory by tracking your inventory levels, forecasting the inventory that you need, and suggesting which products you should order. To adjust your inventory levels, you can perform inventory counts and create inventory transfers.
Requirements for using Stocky
Stocky is available for stores that have Point of Sale enabled for their store, and use Shopify POS Pro for at least one location. You can upgrade your plan to add Shopify POS Pro and then install Stocky from the Shopify App Store.
If you don't have Point of Sale enabled on your store, then you can use inventory tracking in the Shopify admin for your products.