FeatCompare: Feature comparison for competing mobile apps leveraging user reviews

Given the competitive mobile app market, developers must be fully aware of users' needs, satisfy users' requirements, combat apps of similar functionalities (i.e., competing apps), and thus stay ahead of the competition. While it is easy to track the overall user ratings of competing apps, such information fails to provide actionable insights for developers to improve their apps over the competing apps (AlSubaihin et al., IEEE Trans Softw Eng, 1-1, 2019). Thus, developers still need to read reviews from all their interested competing apps and summarize the advantages and disadvantages of each app. Such a manual process can be tedious and even infeasible with thousands of reviews posted daily. To help developers compare users' opinions among competing apps on high-level features, such as the main functionalities and the main characteristics of an app, we propose a review analysis approach named FeatCompare. FeatCompare can automatically identify high-level features mentioned in user reviews without any manually annotated resource. Then, FeatCompare creates a comparative table that summarizes users' opinions for each identified feature across competing apps. FeatCompare features a novel neural network-based model named G lobal-L ocal sensitive F eature E xtractor (GLFE), which extends Attention-based Aspect Extraction (ABAE), a state-of-the-art model for extracting high-level features from reviews. We evaluate the effectiveness of GLFE on 480 manually annotated reviews sampled from five groups of competing apps. Our experiment results show that GLFE achieves a precision of 79%-82% and recall of 74%-77% in identifying the high-level features associated with reviews and outperforms ABAE by 14.7% on average. We also conduct a case study to demonstrate the usage scenarios of FeatCompare. A survey with 107 mobile app developers shows that more than 70% of developers agree that FeatCompare is of great benefit.