So here are some summary stats for reference.
- I released my first paid app, ConcretePal, 83 days ago.
- My average daily net income for that span is: $19.41
- My average daily income from ads for that span is: $8.74
I've released 22 total apps: 14 paid and 8 free (6 of those are ad-supported demo versions of paid apps)
I thought I was going to do very well in the market when I released Spades for $2.99, it was the only one on the market, and it sold very well. But as you can see, that didn't last too long. Sales for a given app settle down to a pretty low baseline, so you constantly need to be releasing new apps if you want to keep the revenue stream coming.
So, I'm not getting rich, but it's nice supplemental income. And it sounds like it's comparable to iPhone apps that are doing reasonably well.
I hope the sales do stay up all right over the next couple of months. I'm not going to be able to release any new apps, since I'm working full-time on my game for the Android Developer Challenge II. It's coming along pretty well. I just hope I can get a decent working version ready for submission by August.
Soon I'll post some screen shots and concept art to give you an idea of where it's headed.