We offer a 3-day trial for all paid plans, during which you can switch between different plans without being charged, allowing you to find the best fit.
At the end of the trial period, you will be charged for the plan you are on at that time. The billing date for the charge is the same as the billing date on your Shopify.
We are using Shopify Payment system. So all charges are modified via Shopify. Check this article to know more information.
If you want to cancel the trial, simply downgrade to the free plan before the 3-day trial period expires and you won't be charged.