The phone shows an app so bare it is almost empty, one icon and a download button. That cannot make fifty thousand a month, which is exactly the thought that clicks. The plainness on screen is the whole argument.
How the packaging works
Title
The title makes the money claim the simple screen seems to contradict.
Thumbnail
The thumbnail holds up the near-empty app the claim is about.
Remix this
When simplicity is the surprise, hold the real product to camera and let its emptiness speak. Adding text or arrows would dress up the very thing that should look undressed.