Which brings up a great digression: the app store gold rush has left us in a situation where it's no longer feasible to sell high-maintenance, low-market software directly to consumers. Consumers will buy games and media in high volume, so you can sell those at a discount. But email clients? Photo apps? Nope. The only way to make that stuff is to sell it as some kind of "cloud" service where you make your money on eyeballs elsewhere. And even then you generally can only make it big that way as part of a larger product suite (c.f. Instagram).

I'd look to the open source world for good geek tools, honestly. I think expecting people to sell them to us in the app stores just won't work. No one will buy this stuff at the $50/seat the developers would have to charge to avoid the Google and Facebook buyouts.