Over the past few years, one of Apple’s sources of revenue was from selling music via their iTunes store. However it seems that either our consumption patterns have changed, or if rivals are stealing Apple’s business, but it has been noted by Morgan Stanley analyst, Katy Huberty, that sales from iTunes have been declining, and that Apple’s App Store has been growing in its place. In fact as you can see in the graph above, it is estimated that come 2015, sales from the App Store will be greater than iTunes. This appears to be the trend which we can see taking place over the years.