Appium is a cross-platform test automation tool for use with native, hybrid and mobile web apps that encourages multiple-platform testing by using test tools and modes of operation that are well known to developers.Appium was built on the idea that testing native apps shouldn't require an SDK or the recompiling of a mobile app. Users can automate any mobile app from any language and it lets them use their preferred test practices, frameworks, and tools. Additionally, users can also test iOS (via Apple’s UI Automation test engine) and Android apps (via Google UI Automator or Google Instrumentation TestRunner) using the Selenium WebDriver protocol. With more than 5,300 commits and 135 contributors, Appium continues to evolve rapidly, always guided by its core philosophy. Sauce Labs and its ecosystem team are proud to sponsor the development and maintenance of this world-class open source project.