With which agent? What kind of apps?

Without more information I'm very skeptical that you had e.g. Claude Code create a whole app (so more than a simple script) with 20 cents. Unless it was able to one-shot it, but at that point you don't need an agent anyway.

I've "written" whole apps by going to GitHub, cloning a repo, right clicking, and renaming it to "MyApp." Impressed?