Due to the high demand for mobile applications, given the exponential growth of users of this type of technology, testing professionals are frequently required to invest time in studying testing tools, in particular, because nowadays, several different tools are available. A variety of tools makes it difficult for testing professionals to choose the one that best fits their goals and supports them in their work. In this sense, we conducted a comparative analysis among five open-source tools for mobile testing: Appium, Robotium, Espresso, Frank, and EarGrey. We used the documentary analysis method to explore the official documentation of each above-cited tool and developed various comparisons based on technical criteria reported in the literature about characteristics that mobile testing tools should have. Our findings are expected to help practitioners understand several aspects of mobile testing tools.

翻译：由于移动应用用户呈指数级增长，导致对这类技术的需求极高。测试专业人员经常需要投入时间研究测试工具，特别是因为如今存在多种不同的工具可供选择。工具类型的多样性使得测试专业人员难以选择最符合其目标并能支持其工作的工具。为此，我们对五种开源移动测试工具（Appium、Robotium、Espresso、Frank和EarGrey）进行了比较分析。我们采用文档分析方法，探索了上述每种工具的官方文档，并基于文献中报告的关于移动测试工具应具备特征的技术标准，进行了多维度比较。研究结果有望帮助从业者深入了解移动测试工具的多个方面。