The best thing Apple could do to increase the quality of apps is remove every top list from the App Store.
I hope Apple realizes how important it is to everyone -- developers, customers, and Apple -- that they make changes to encourage more high-quality apps. If they're trying to boost iPad sales and increase differentiation between iOS and Android devices, that's the first place to start.
But that won't solve the biggest problem. (Neither will upgrade pricing, trials, or any other theoretical panacea.)
—Marco Arment, App Rot