JsRates: Custom Shipping Rates
The reviews are overwhelmingly positive and consistently describe the app as a powerful solution for highly complex shipping needs. Users praise its flexibility, especially for custom shipping logic that Shopify’s native settings or other apps could not handle, including multi-vendor setups, multi-location shipping, LTL freight, vendor-specific tiers, postcode restrictions, surcharges, package splitting, and live carrier rate integrations. Many reviewers say the app saved them from needing expensive custom development, and several mention that AI-assisted coding and the built-in editor made it possible to implement advanced logic without hiring a developer. Support is another major strength: reviewers repeatedly highlight fast, knowledgeable, hands-on help from the developer/team, often noting quick responses and willingness to go beyond basic support to help configure or customize the app. The main negative aspect is not about the app’s quality, but about the complexity of the problems it solves. A few reviews imply that setup can take persistence or careful configuration, especially for very advanced shipping logic, though support helps smooth that process. Overall, the sentiment is that JsRates is exceptionally capable, reliable, and cost-effective for merchants with difficult shipping requirements, with the only real tradeoff being that its power comes with a more technical setup than simpler shipping apps.
Review RSS feed
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.
We run a very complex shipping tier setup with multiple vendors and different shipping logic per vendor. This app handles it all for us seamlessly and it can literally do anything we need. The app support is top class and i'm very happy with how the app performs.
Absolutely amazing. Does everything it says and more. Shows cool analytics and the built-in AI Code editor is great. Good docs and overall great experience. Wish they made more apps. Thanks for making this app!!!!
Best customer service and support I have seen in 6 years using Shopify apps. Highly recommended, almost works miracles :)
Thank you for the feedback. I’m really glad the support has been useful and that the app is helping your store. I appreciate you taking the time to share your experience.
Great support- app works very well and the developer is great.
Thank you so much! Really glad the app’s working well for you, and I appreciate the kind words about the support.
Sign up to receive AppNavigator updates
Find out when we add keyword-monitoring, review RSS feeds and more.