Client software choice
Official OpenVPN Connect app
On the Google Play Store, the client you can download and install for free there is called OpenVPN Connect. This program supports only one active VPN tunnel at a time. Trying to connect to two different servers at the same time is a function we did not build into our official OpenVPN Connect app, and it is also not possible because the underlying operating system does not allow this. The OpenVPN Connect app is able to remember multiple different servers, but only one can be active at a time.
To obtain the OpenVPN Connect app, go to the Google Play Store on your Android device, or open the link below to the Google Play Store. On the Google Play Store on your device, look for the words “openvpn connect" and the application will show up in the search results. You can install it from there. Once installed an icon will be placed on your home screen where you can find the app. Once you have it open you can use the Access Server option to start the import process. You can use the option to import directly from the web interface of the Access Server or use the import from file option. If you use the web interface import option you need to enter the address of your Access Server’s web interface here, along with username and password. If your server is on an unusual port (not the default HTTPS port TCP 443), specify the port here. Once the import has completed, you are ready to use the app.
OpenVPN open source OpenVPN for Android app
OpenVPN for Android is an open source client and developed by Arne Schwabe. It is targeted at more advanced users and offers many settings and the ability to import profiles from files and to configure/change profiles inside the app. The client is based on the community version of OpenVPN. It is based on the OpenVPN 2.x source code. This client can be seen as the semi-official client of the OpenVPN open source community.
There may be other OpenVPN clients available on the Google Play Store as well, but we have no information on them here.