Open the Google Play Store on your device and search for "bullguard VPN", or simply click HERE from your Android device.

Next tap on INSTALL and the download and install process will follow.

The install process should complete in a few moments after starting it and, once finished, you can start the BullGuard VPN application. To run the program, tap on OPEN. 
If you want to start it at a later time, just exit the Play Store.