Carrier Services & Checkout Logic

Shipping Rates That Tell the Truth

Flat-rate shipping is a quiet margin killer. Set it too high and baskets get abandoned at checkout. Set it too low and every heavy or awkward order eats your profit. Shopify's built-in rates can only take you so far, especially when your products vary wildly in size, weight or destination.

A carrier service app fixes this properly. When a customer reaches checkout, Shopify asks your app what delivery should cost for that exact basket, and your app answers in real time: the right rate, calculated from your rules, your carriers and your margins.

Logic As Simple or As Clever As You Need

• Weight, dimensions and quantity based calculations
• Postcode, region and country rules, including surcharges and exclusions
• Live carrier rates blended with your own pricing rules
• Free shipping thresholds that protect margin instead of destroying it
• Special handling for fragile, oversized or made-to-order items

Proven at Checkout, Where It Counts

We run carrier service apps in production for retailers in the UK and US, quoting on real baskets every day. Each one includes full request logging and replay, so if a rate ever looks wrong we can reproduce the exact request and show you why, then fix the rule in minutes.

If your current shipping setup is a spreadsheet of compromises, tell us what delivery actually costs you and we will make checkout quote it.