Due to the rapid growth in the number of mobile applications (apps) in the past few years, succeeding in mobile app markets has become ruthless. Online app markets, such as Google Play Store, let users rate apps on a five-star scale and leave feedback. Given the importance of high star-ratings to the success of an app, it is crucial to help developers find the key topics of user-reviews that are significantly related to star-ratings of a given category. Having considered the key topics of user-reviews, app developers can narrow down their effort to the user-reviews that matter to be addressed for receiving higher star-ratings. We study 4,193,549 user-reviews of 623 Android apps that were collected from Google Play Store in ten different categories. The results show that few key topics commonly exist across categories, and each category has a specific set of key topics. We also evaluated the identified key topics with respect to the changes that are made to each version of the apps for 19 months. We observed, for 77% of the apps, considering the key topics in the next versions shares a significant relationship with increases in star-ratings.

中文翻译：

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用户评论太多，App开发者首先应该看什么？

由于过去几年移动应用程序（apps）数量的快速增长，在移动应用程序市场取得成功变得无情。在线应用市场（例如 Google Play 商店）让用户可以对应用进行五星级评分并留下反馈。鉴于高星级对应用程序成功的重要性，帮助开发人员找到与给定类别的星级显着相关的用户评论的关键主题至关重要。在考虑了用户评论的关键主题后，应用程序开发人员可以将工作范围缩小到对获得更高星级评级而重要的用户评论。我们研究了从 Google Play 商店收集的 10 个不同类别的 623 个 Android 应用程序的 4,193,549 条用户评论。结果表明，跨类别普遍存在的关键主题很少，每个类别都有一组特定的关键主题。我们还针对 19 个月内对应用程序的每个版本所做的更改评估了已确定的关键主题。我们观察到，对于 77% 的应用程序，考虑到下一版本中的关键主题与星级的增加具有显着的关系。