Is there a way to intergrate a Square POS with the Shopify online store?
Not a Shopify developed app, but Trunk works well, using skus to sync inventory
DO NOT USE CHEKCOUT REPUBLIC! They charged me $500 plus $30 a month and then took every dollar that came into my shopify and sent it to another company. By the time we realized what was happening a few months later we had sent out tons of products and lost ALL of the money that had come in. They never gave it back and then just ghosted us, keeping our 4 months of sales.