Is there a word for selecting yourself as the target audience for an invention or product?
I have scoured through everything I could find, and I am starting to think that such a word simply does not exist.
The words with "self" in it seem to the only solution.
I could see a few ways to phrase it well in that format though.
"The developer said he invented the app to address his own needs. Now his company succeeded and targets a more broad target audience."
I know it's not an answer to your question, but emphasizing the fact that the developer addressed his own needs also serves the same purpose.