Add-On: Crosscall (b) is a free addition to supported devices that enhances their functionality. This is not a stand-alone app and should not be downloaded by itself. It is available through other apps automatically on supported devices.

This add-on offers several useful features that improve the device's performance. It allows users to remotely access and control their devices using the TeamViewer app. This can be helpful for troubleshooting issues or accessing files and applications from a different location. Additionally, it allows users to share their screens with others, making it easier to collaborate on projects or presentations.

Overall, Add-On: Crosscall (b) is a useful addition for supported devices that can enhance their functionality and improve productivity. However, it is important to note that this is not a stand-alone app and should only be used on supported devices through other apps.