I have a trivia app we built as part of a sports hackathon: https://itunes.apple.com/us/app/hat-trick-daily-sports-trivi...

We won the first round of the hackathon (lost the finals). We've made a little money on in-app purchases and had an investment offer from one of the judges (we declined).

We still work on the app but no one has dropped their full-time job yet. We're thinking of applying to the Disney accelerator with it.