The Chromecast app is available for download via the Chromecast.com website by selecting the "Learn" link at the top of the page, choosing "Learn How to Cast On Your TV" and then clicking the setup link included in the first step of the instructions given. The second generation Chromecast app supports Windows 7 or higher and Chrome 28 and higher, while the first generation Chromecast app only supports Windows 7 or higher.
Chromecast.com automatically detects the device in use and only offers the download if the device in use is compatible with the specific Chromecast app in question. The same Chromecast app is used by Windows-based tablets as regular laptops running a Windows operating system. Chromecast does not function properly if the app is opened without the connected dongle.
While the official Chromcast app does not support Macintosh OS X laptops, there are various Web apps available on Macs using Chrome that are supported by Chromecast with the Cast Extension tab available within the browser. Chromecast is supported by iOS 7.0 or higher and runs on both iPhones and iPads. The iOS Chromecast app is available for download via iTunes. Accessing the download page at Itunes.apple.com automatically opens iTunes and begins the compatible Chromecast download. The iOS Chromecast version includes all features available on the other versions, such as voice search functionality and full playback control; however, some features are not available in all countries.