JsRates: Custom Shipping Rates

JSRates gave us the flexibility to build shipping logic that we simply could not achieve with standard Shopify settings or visual rule-builder apps. We used AI to help write all of the JavaScript, which made it possible for us to build a very advanced custom shipping system without hiring a developer. Our setup now handles refrigerated postal-code zones, frozen-product rules, package splitting, cart-value shipping allowances, remote-area surcharges, and fallback behavior if something goes wrong. One of the biggest advantages is that JSRates can call a third-party shipping API directly to retrieve live carrier rates. In our case, we send our calculated package sizes, weights, origin, and destination to our external rate provider, then JSRates decides which returned carrier/service should actually be shown to the customer. We also no longer need separate “hide shipping rate” Functions or apps. JSRates now handles the decision process itself and returns only the correct shipping option to Shopify. Despite how complex the logic is behind the scenes, the checkout experience is very simple for the customer. We can offer things like Refrigerated Courier delivery only where it actually applies, while still falling back safely if a carrier rate is unavailable. The app is also very developer-friendly. We were able to separate configuration, helper functions, postal-code data, third-party API logic, and the main decision tree into different files, which makes the whole system much easier to understand and maintain. If you have shipping requirements that go beyond Shopify’s standard settings, JSRates is incredibly capable. It solved problems we had been struggling with for months. Highly recommended.

Best customer service and support I have seen in 6 years using Shopify apps. Highly recommended, almost works miracles :)

Great support- app works very well and the developer is great.

JsRates is the only way to go. I have tried so many different apps, from cheap to very expensive, and they all have so many little shortcomings and flaws. You see, our store has very complex shipping needs. In stock, back order, made to order, drop-ship, LTL freight. You name it. And I spent years trying to find the right software but always feeling like I was putting a band aide on the problem but never solving it. This all changed with JsRates. Using JavaScript to customize the rate process is honestly the only way to go, and this software is the perfect solution to do so. Since I'm not a developer, Behailu was very helpful in getting set up and running. And then from there I have been able to use AI to modify the code as needed for further tweaks. I can now do just about anything that I want when it comes to how shipping is calculated and quoted to the customer at check-out. It's fantastic and I would recommend to anyone JsRates as a very reasonably priced solution with unlimited flexibility. I honestly don't know what I would do without it now that I have fully integrated it into our tech. stack.

The app is able to accommodate my complex shipping details and works perfectly! The support from the developers is very prompt and helped me get the app setup and running extremely quickly. Show more