How much $$$ did you make?
Assume 2000 x 70c = $1,400
Not bad for a week/weekends work (honeymoon apparently, go figure?!? :D )
But a bit ... lacking ... when considered as a #1 hit. On the other hand, maybe it hasn't been out there too long. You could say okay the time he and his beta tester put in was worth maybe $20/hour, but that ignores how an app can be a revenue stream that keeps on generating income.
If he 'only' made $1000 per year from that app (as is) every year for the rest of his life that'd be a pretty good ROI for a weeks work.
So don't get too hung up on my estimate, the advantage of an entrepreneur compared to a work for hire salaryman is to keep getting paid long after the work is done.
Unfortunately, the popularity took a dive after the first few weeks so my run rate is much lower now. Also, a big part of my app sales was driven by press which you only get when you do new versions, etc. My wife and I working together on a soon-to-be-launched app also meant that I haven't really gotten back to shipping new updates, etc.