If your store is still in development on Shopify you can create a Zakeke subscription for free.
Basically you won't need to pay if you're just creating your store, definying your catalog and products. You can subscribe to a Zakeke plan and you will not be charged, no matter the plan you choose.
Once your store is published, the Zakeke's free subscription activated on your development store will be automatically canceled.
In order to continue using Zakeke on your now up-and-running online shop, you'll need to create a proper subscription.