I'd phrase it more like "single founder evolving towards success" with my own application, http://www.simplediagrams.com, which is earning about 2K a month.

Like many of you I designed, developed and marketed the app myself. (Although I've just recently hired some help for coding.) Biggest challenge is just to find more time to work on it, since I have other work that takes precedence.

Peldi and Rob Walling are big inspirations.