I have Shopify application, where clients are paying with Recurring application charges:
https://help.shopify.com/api/publishing-your-app/charging-for-your-app/recurring-application-charges.
I would like to add one-time charges for some additional features: https://help.shopify.com/api/publishing-your-app/charging-for-your-app/one-time-application-charge Is it possible to use both charges type for the same client?
Yes, you can definitely do that.