Making money or growing the app

I’ve looked for ways to monetize apps through the forums but it seems like there are currently no ways,I don’t understand how people who have uploaded an app to App Store or google play are making money, or even supporting the growth of the app as the database bills increase. Please someone who has already posted an app answer this question as I’am having trouble figuring out how to make money with my app

I think your mindset is a little narrow. Adverts are far from the only way to monetize an app.

Build an app that saves people money, time or in some other way enhances their productivity. Let them buy it through a website.

What is your app idea, and why would people want to use it? What is its unique value add?