Robotium is a popular automated testing framework designed specifically for Android applications. It provides simple APIs to write powerful and robust automation scripts that can interact with various components of Android apps, including activities, dialogs, and menus. With Robotium, testers can create scenarios that simulate user behaviors on both native and hybrid applications. This tool is favored for its ease of use and the ability to quickly develop test cases, which can be instrumental in agile development environments where time and efficiency are critical. The framework supports both black-box and gray-box testing, making it flexible and adaptable for different testing needs.