Connect on demand app mode (Require at least Android 5.0)
Allow to connect the VPN when the selected apps send a packet.
The connect on demand mode can be changed in its settings:
start the app
tap on top left icon
tap on "Connect on demand" button
Here you can change between app and routing mode (the two modes cannot be mixed)
In app mode the VPN is started when the select apps send a packet
In routing mode the VPN is started when the device send a packet to the selected routes
The notification settings has been moved in the global options