  App store analysis has become an important discipline in recent software
engineering research. It empirically studies apps using information mined from
their distribution platforms. Information provided by users, such as app
reviews, are of high interest to developers. Commercial providers such as App
Annie analyzing this information became an important source for companies
developing and marketing mobile apps. In this paper, we perform an exploratory
study, which analyzes over seven million reviews from the Apple AppStore
regarding their emotional sentiment. Since recent research in this field used
sentiments to detail and refine their results, we aim to gain deeper insights
into the nature of sentiments in user reviews. In this study we try to evaluate
whether or not the emotional sentiment can be an informative feature for
software engineers, as well as pitfalls of its usage. We present our initial
results and discuss how they can be interpreted from the software engineering
perspective.
