Creating a GPT Android App

Hey guys so I have hired a freelancer to create a GPT app for me. I have a large audience on youtube that would like that app
I was wondering if there were any owners of these apps that could tell me how well they earn

Thanks.

Never created a GPT app but I'm sure there's a lot of money to make from that if you reward people completing simple tasks. Surveys, apps installs etc...
Maybe you will need to invest a lot in the beginning but after that when people start to know it then you will surely make good money from it. Good luck!