Shopify handles the customer experience, and we make sure what it shows comes from the POS.
Shops that chose Shopify usually did it for the customer experience: a fast checkout, payment methods that work, a store that looks right on a phone. That is rarely where the problem sits.
The problem is that Shopify knows nothing about what is on the shelf. The range is maintained in one place and sold in another, and the gap between them widens every week.
We let Shopify go on owning the customer experience and fill it from underneath with data from Nutid. Nothing changes in how you sell, you simply stop maintaining the same range in two places.
The connection runs both ways, with the POS as the record of truth for range and stock.
Shopify has its own rules for how products and variants may be shaped, and those rules decide what your data has to look like on the way in.
You give us access to the Shopify store and to Nutid, and tell us if there are products you want to steer by hand. The connection takes care of the rest.
Keep the store you built, replace only the manual work behind it.