ShipFit

Shopify splits carts across shipping profiles, causing duplicate shipping charges. Merging into one profile fixes that, but then shows every rate for every cart, even ones that can't ship the goods, like dangerous goods, oversized freight, or liquids. ShipFit keeps a single profile but shows only the rates that fit each cart, using a shipping class metafield per product matched to rates named by class (e.g. DHL Paket (class-500)). The highest-priority class wins, and overrides suppress others.