Writing on her blog, after sharing how much she has made on her apps over the last few years:
It’s simultaneously a lot and a little. It’s a lot for most developers. It’s a little for the developers I follow on Twitter. Early on, someone asked me how I would define success for myself as an indie developer. I remember stressing that my apps were just side projects (they are) and that I’d be happy if my revenue could cover the cost of my personal device upgrades (it has). At the time, I think I forgot to say something about how I wanted to make things that improved people’s lives, or just made them smile. In that way, I’ve also succeeded, and hearing from happy customers has been incredibly rewarding.