Should I submit an app development company?

I'm trying to develop an app as a hobby A lot of people say you don't have to run a business if you're going to advertise (if the profit is small) By the way, I have to pay for the in-app payment, is that right? Can't I put in-app payment without a business operator? And if the company asks you to get rid of the business, I wonder if I need to download the app.

android

---