Apple makes iOS testing available for free to all macOS users, with their Simulator app. Several popular web-based browser testing services make it possible to test iOS's Mobile Safari, but the best of these tools require an additional fee, have limited free features, or restrict the number of users who can use an account at the same time. Part of preparing most websites and web apps for shipment is testing across devices. The next in the series is Set Up a Windows 10 Virtual Machine and Run Internet Explorer 11 and Edge on Mac or Linux. This article is part of a series on running cross-browser tests directly on your primary computer.