The QS Add-On: Allview is an add-on to the TeamViewer QuickSupport app designed to provide added features to the app. This add-on is not a stand-alone app and is only available for download through the TeamViewer QuickSupport app on supported devices.

The QS Add-On: Allview provides additional features such as remote control support and screen sharing capabilities to the TeamViewer QuickSupport app. This add-on is free to use and is available in the Business & Productivity category.

Overall, the QS Add-On: Allview is a useful extension to the TeamViewer QuickSupport app that offers added functionality to users. However, it is important to note that this add-on is only available on supported devices and cannot be downloaded as a stand-alone app.