As free apps market have always outnumbered the paid ones (in terms of profits and download numbers)

Techcrunch also says that more than 90 percent of apps on the market now are free. And, the revenues generated from apps that charge for download (paid apps) are expected to go down in upcoming years.

According to the latest report and study by Statista, here are the details on mobile advertising spending in the year 2019 and expected in 2020.

Year 2019: 190 billion U.S. dollars Expected in 2021: 300 billion dollars

Source:
https://www.specks.com.ng/2021/08/how-to-create-app-for-free-and-make.html?m=1