Depends on your product, model, and demographic. At work our refund rate is like 30% for Japan. Investigating this, it turns out there is a cultural behaviour

Depends on your product, model, and demographic. At work our refund rate is like 30% for Japan. Investigating this, it turns out there is a cultural behaviour where converting at a higher rate early and refunding if it's not a good fit is the normal way of doing things. And in a past life, general 4% refund/return rate is pretty common across most ecom markets. Not saying apps are in this boat but if you ignore refunds in business you're in for a bad time.