Selecting a UI element is a fundamental operation on webpages, and the ease of tapping a target object has a significant impact on usability. It is thus important to analyze existing UIs in order to design better ones. However, tools proposed in previous studies cannot identify whether an element is tappable on modern webpages. In this study, we developed Tappy that can identify tappable UI elements on webpages and estimate the tap-success rate based on the element size. Our interviews of professional designers and engineers showed that Tappy helped discussions of UI design on the basis of its quantitative metric. Furthermore, we have launched this tool to be freely available to external users, so readers can access Tappy by visiting the website (https://tappy.yahoo.co.jp).

翻译：在网页上选择用户界面元素是一项基本操作，而目标对象的点击便捷性对可用性具有重要影响。因此，分析现有用户界面对于设计更优界面至关重要。然而，先前研究提出的工具无法识别现代网页上的元素是否可点击。本研究开发了Tappy，该系统能够识别网页上的可点击用户界面元素，并根据元素尺寸估算点击成功率。通过对专业设计师和工程师的访谈，我们发现Tappy基于其量化指标有效促进了用户界面设计的讨论。此外，我们已将该工具免费开放给外部用户，读者可通过访问网站（https://tappy.yahoo.co.jp）使用Tappy。