Unlike other apps by the same developer, this VPN can't be bound to certain connections, like unsecured Wi-Fi SSIDs.
The free plan is limited to 500mb of data. The data cap can be increased to 1.5gb by participating in a twitter promotion.
CyberGhost offers a free plan without restrictions on data use. The premium service increases speed.
The free account is limited to 100mb of data a day.
The free plan is limited to 500mb of data for up to 5 devices. The free data limit can be increased.