Private Internet Access is proud to offer a Linux ARM version of the application, which is downloadable from within the Client Control Panel, and can be found here:  

https://www.privateinternetaccess.com/account/client-control-panel#downloads 

Or 

https://www.privateinternetaccess.com/pages/changelog 

If you have any issues with the install, please reach out to our support department via chat, which can be found on the main page of our site in the bottom right-hand corner.