Contender: Leveraging User Opinions for Purchase Decision-Making

User opinions posted on e-commerce websites are a valuable source to support purchase making-decision. Unfortunately, it is not generally feasible for an ordinary buyer to examine a large set of reviews on a given product for useful information on certain attributes. We present a system named Contender that can summarize product reviews aligned to the attributes of these products. Contender is implemented as an Android app for smartphones.