The app is an experiment to figure out what makes people buy things, to figure out what people want. I know how to write unit-tests and to write code, but I hav

The app is an experiment to figure out what makes people buy things, to figure out what people want. I know how to write unit-tests and to write code, but I have no idea how to complete the outer loop -- to create something that people would eagerly buy. The app represents a shot in the dark to figure out this space. If you have comments or ideas about what direction to take this in, feel free to share.