Configuration file for iOS: kit.ovpn
The client for iOs OpenVPN Connect is available in the Apple App Store
As the iOS client only supports tun you are not able to use VPN2VLAN with iOS.
After you have installed the app you have to import the configuration file. If you have problems to download the file from the web site, download the file to your computer and then send it by email to your mobile device. Tap on the file and add it to the OpenVPN app. Then tap on the plus sign to import the configuration file.
Enter username and password and establish the VPN connection.