The Monthly Plan plan by Private Internet Access does have a VPN Client.
It does not have bandwith restrictions, and they don't keep your connection log. They also do have a mobile client and a Kill Switch feature is available.
This plan also comes with the following benefit(s):
Customer Support: 24/7 Customer Support
Server Locations: 3251+ Servers in 25 Countries
Number of Connections: 5
VPN Protocol: PPTP, OpenVPN, L2TP/IPSec