OpenVPN Connect is the “official” application from OpenVPN Inc. and is designed to be more user-friendly for VPN users with limited technical knowledge. This means that it is less equipped than the openvpn for android that is targeted at more advanced OpenVPN users.
Openvpn for Android is a no-cost and open source client made by Arne Schwabe that lets you connect to any VPN service that supports the OpenVPN protocol. It’s a great option for devices that aren’t compatible with pre-configured “off the shelf” VPN apps that are available in the Google Play Store. It’s fairly simple to set up. You’ll need to import your VPN profile files (the config files have an extension of.ovpn) which you can download from the website of your provider or by contacting their live chat support team.
Once you’ve imported your profile, just tap one of the servers listed and connect to that server. Once connected you’ll notice that your Internet traffic will be directed via a secure channel to the server that you have selected in the app. You can see your connection status and details on the Status tab. A kill switch is enabled by default, and it will shut down your Internet connections when the VPN tunnel stops.
The app offers a per-app VPN as in addition to an always-on option that automatically establishes a VPN connection whenever the app is opened, and it will continue running even after your device has gone to sleep or switched networks. This option however requires Android 7.0 or higher, and may drain your batteries more than usual.
http://openvpnandroid.com/secure-data-room-that-stimulates-fast-performance/
