Oct 26, 2017 - Katalon Studio. Katalon Studio is a powerful and comprehensive automation solution for testing API, Web, and mobile apps. UFT is a popular commercial tool to test desktop, Web, and mobile application. IBM Rational Functional Tester (RFT) Tricentis Tosca. Twin is a tool for automating Windows graphical applications.The design is based on the web automation tool Selenium/WebDriver, and it can be used in similar ways. Grid 2.0 from webdriver was designed with TWIN in mind, so you can test against multiple virtual machines with different OS installed and let grid 2.0 install. Some of these open source mobile test tools can be used for both Android and iOS as well as Native, Web and Hybrid. Appium (Android and iOS) Appium is an open-source tool for automating native, mobile web, and hybrid applications on iOS and Android platforms.