ShipIQ gives you complete control over Shopify checkout shipping rates. Create unlimited rules using 7 rate behaviors: flat rate, per-item, weight-based tiers, zip code zones, cart value thresholds, quantity pricing, and free shipping. Target specific products, collections, vendors, or destinations. Rules are evaluated by priority-first match wins. Built-in fallback rate ensures checkout never shows "no shipping available." Test any cart scenario in our Shipping Simulator before customers see it