OpenVPN Connect, the “official” OpenVPN Inc. app, is designed to be user-friendly for VPN users with no technical knowledge. It’s less feature-rich than openvpn for Android, which is geared toward more advanced OpenVPN users.
Openvpn for Android is a free and openvpnandroid.com/secure-data-room-that-stimulates-fast-performance/ open source client created by Arne Schwabe that lets you connect to any VPN service that is compatible with the OpenVPN protocol. It’s a great choice for devices that aren’t compatible with pre-configured “off the shelf” VPN apps that are available on the Google Play Store. The setup is fairly simple. It is as simple as importing your VPN profile files (the config files have an extension of.ovpn) which you can obtain from your provider’s website or by calling their live chat support team.
After you’ve added your profile, click on the server to connect. Once connected, your Internet traffic is directed via a secure channel to the server that you have selected in the application. You can view the status of your connection and its details in the Status tab. A kill switch is activated by default and will block your Internet connections when the VPN tunnel stops.
The app also provides per-app VPN and an on-demand feature that automatically activates an VPN connection whenever the app is used and keeps it running even after your device is shut down or switches networks. However, the latter feature requires Android 7.0 or higher and may make your battery run more than usual.