I think the bigger issue is just relying on an app. Most apps are a few dollars. You will not be able to sustain a steady paycheck with this kind of business

I think the bigger issue is just relying on an app. Most apps are a few dollars. You will not be able to sustain a steady paycheck with this kind of business model. Apps should be a freebie (not literally free in all cases, but cheap) that is merely a hook/marketing channel for your business.