BIOGPAPHY & EXPERIENCE: I am a mobile application developer who is interested in their promotion. The App Store has grown by leaps and bounds in the four years since I had a big success with a little app. It now has over a half-million applications. But, it's still entirely possible to find niches where nothing exists, or—at the very least—nothing useful exists.
Recently, a friend of mine with a fairly common medical condition was looking for an app to help him track it. He found one app that dealt with the problem, but it was terrible: it hadn't been updated in years, it was buggy, and it wasn't updated for Apple's Retina display. He had been looking for an opportunity to learn how to build iOS apps in Cocoa Touch with Objective C, and had just needed proper motivation. Finding a problem he needed to solve where the existing solutions were inadequate was just the incentive he needed to dive into it. A couple weeks later, he's just about ready to publish it to the App Store. Getting paid app reviews you increase the chances of recognizing your application in mobile stores. There's no guarantee that you'll find an untapped niche as easily as either of us, but if you keep your eyes peeled, you're bound to find something sooner or later. Finding potential ideas and vetting them is a topic worthy of its own blog post, so stay tuned for that. I'll expound on this in a lot more detail soon.
The moral of the story is to keep your eyes peeled for those rare cases where there isn't an app for that. It doesn't happen nearly as often as it used to, but every now and then opportunities still present themselves.