Add GUI application to turn on/off Zerotier

I’m using Zerotier on couple of devices and noticed that there is no easy way to enable/disable vpn.
What I want to ask is to create GUI application that will allow easy switch on/off.
On Android add widget.
On Linux/Windows, add app that will create icon in toolbox to switch VPN on/off (i.e. like Windscribe has on Linux).