The development of accessible mobile applications has become a great challenge for accessibility experts since aging affects users’ capabilities. Among them, the most frequent is that of visual impairment, specifically low vision. Currently, many mobile applications help with daily activities, but not all are accessible, which means that a large number of users cannot easily access and interact with them. To test accessibility in mobile applications, Google has an Accessibility Scanner for Android which is a tool that helps to verify the compliance with the accessibility guidelines proposed by the WCAG 2.1. A case study is presented that applies this tool to the development of a mobile application for the sports center “Crossfit Coyote Fitness.” This research addresses the limitations of this method, contributing to future studies related to accessibility methods for mobile applications in achieving more inclusive applications.