Will Shipping Rates Calculator+ display carrier calculated rates in my Shopify basic plan?
If your store is in the United States or Canada, USPS and Canada Post carrier-calculated shipping rates are available for all Shopify plans. Please look at Shopify Shipping Brings Calculated Rates to All Shopify Plans.
You can also contact Shopify to add carrier-calculated rates for other countries or carriers for a small fee or by switching to an annual payment. Please see the Shopify response at https://community.shopify.com/c/Shopify-APIs-SDKs/Adding-third-party-calculated-rates-to-my-plan/m-p/688611/highlight/true#M46821
If you configure your shipping rates that way and then install our app, the app will show your shipping rates and delivery estimates on your shopping cart page.