The energy efficiency of mobile applications has been a highly tackled research problem within the last years. Many research groups have focused on optimizing the hardware of mobile devices, as well as their middleware and applications, increasing both the devices' uptime and their users' satisfaction. However, only scarce work has analyzed whether users notice and care about energy-efficiency problems in mobile applications. Thus, in this paper, we address these questions by evaluating a large set of user comments extracted from the Google Play market place for Android applications. We analyze more than 9 million user comments and show that more than 18% of all commented applications have comments complaining about energy consumption. Besides, we identify major causes for the inefficiency of many mobile applications.

As mobile devices are nowadays used regularly and everywhere, their energy consumption has become a central concern. However, today's mobile applications often do not consider energy requirements and users lack information on their energy consumption before they install and try them. In this paper, we compare mobile applications from two domains and show that they reveal different energy consumption while providing similar services. We define microbenchmarks for emailing and web browsing and evaluate apps from these domains. We show that non-functional features such as web page caching can but not have to have a positive influence on an application's energy consumption.

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The 4th edition of the international workshop on model-driven robot software engineering (MORSE) was held at the International Conference on Software Technologies: Applications and Foundations (STAF). The workshop took place in the city of Marburg, Germany, on the 21st of July 2017. The focus of this year's edition of the workshop was on scenario-based development and interaction modeling. In this report, we first present a synopsis of the workshop sessions before we highlight concerns raised in workshop's interactive discussion.