I. Introduction
App stores provide a rich source of information about apps concerning their customer-, business- and technically-focussed attributes. Customer information is available concerning the ratings accorded to apps by the users who have downloaded them. This provides both qualitative and quantitative data about the customer perception of the apps. Business information is available concerning the downloads and price of apps. Technical information is also available in the descriptions of apps, but it is in free text format, so data mining is required to extract the technical details required for analysis.