Disconnecting from a server in the OVPN mobile app is easy and can be done with a single click.
When the app is opened on your mobile device, you'll see the OVPN logo. If it is gray, you are already disconnected. If the OVPN logo is blue and spinning, that means that you are connected.
To disconnect, simply click the OVPN logo. The OVPN logo will turn gray, indicating that you are disconnected.