At first I thought that if I made a bunch of $0.99 apps that were all pretty nice that they would eventually start to make me some decent passive income. However, after publishing five $0.99 applications in the the Apple App Store, I'm finding that I make around $5/day, which is basically nothing. Should I invest time into creating an even better app, hire a designer, spend money on PR and marketing, and then keep spending time updating/managing that app? Or should I continue to produce more applications solo?