Add-On: HiHi is a productivity tool developed by TeamViewer that can be used through supported apps on Android devices. It is important to note that this is not a stand-alone app and should not be downloaded individually. The purpose of this add-on is to enhance the functionality of other apps, allowing users to increase their productivity and efficiency.

The add-on provides several features to improve productivity, including the ability to share files, screens, and documents with ease. It also allows users to communicate with each other through chat, video, and voice calls, making collaboration effortless. The add-on is free to use and can be accessed through supported apps on Android devices.