At some point, we'll all have to stop binging on discounted apps and start being reflective -- and that's when Distimo's 2011 'App Year in Review' report can serve as a nice digestive. Alongside some predictable trends, such as an impressive 400 percent surge in available Windows Phone apps, it also reveals a few interesting stats about the market leader. iPhone app downloads in the US "have been declining for nearly the entire year," it says, although there was big spike following the launch of the