What VPN if any works well with the Amazon Fire Stick?

Is it possible to add a working VPN on the firestick? I was going to try IPvanish for a month until I noticed that once you sign up and pay for that month you are tied in for a longer period and funds auto deducted. I just want a pay as you go sort of thing if it's not free of course.

I want to be able to use all my addons on Kodi not just a few due to the ip limitations. :good: