Do products on my Shopify store have to be in the same currency, as my billing method on Podbase?

No, you can sell products in your store in whichever currency you like and at whatever prices you like. The same goes for shipping, if you like to offer clients “Free shipping” make sure you add shipping costs to the product selling price.

Nope, you can sell products in your store using any currency and set your own prices. The same applies to shipping—if you want to offer 'Free Shipping,' just make sure to include those shipping costs in the product price.