OpenVPN Connect is the “official” application from OpenVPN Inc. and is designed to be more user-friendly for VPN users with no technical expertise. It is, therefore, less feature-rich than the openvpn android app which is geared towards 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 choice for devices that aren’t compatible with pre-configured “off the shelf” VPN apps that are available on the Google Play Store. Setup is relatively easy. You just need to import your VPN profile files (the config files have an extension of.ovpn) which you can obtain from the website of your provider or by reaching their live chat support team.
Once you’ve imported your profile, tap one of the servers in the list to connect to that one. Once connected then your Internet traffic will be directed via a secure channel to the server selected in the application. You can view the status of your connection and its details in the Status tab. The kill switch is turned on by default. It will disable your internet connection when the VPN tunnel drops.
The app also has per-app VPN and an automatic feature that automatically begins a VPN connection when it is opened and continues to run even after your device is shut down or switches networks. However, the latter feature requires Android 7.0 or higher and could draw more power from your battery than usual.