Stormblood said:
Be careful not to use free VPNs. Paid VPNs > no VPNs > free VPNs.
Free VPN is not a terrible idea, granted you don't do nothing personal with it. But take it for granted your actions are logged by them, but if it's a good one, these cannot be seen by your ISP.
Many Free VPNS which are really crowded just fail to effectively "log" or to observe data, as they simply may have millions of hoarders. What happens in this case is that they sell their data, or show you ads. Or both. So avoid doing anything personal from a random Free VPN. Just use for warfare only if you want to use one.
Free = There's nobody that paid for it. All one has is a broad IP from a region and that is it, and they know someone with this IP looked at something. Your Internet Service Provider, does not see.
If you go for a Free VPN, you should go for a really crowded one. In the Android and Appstore there are Apps that have gazillions of downloads. These can be decent for this type of work, and free.
VPN is not an anonymity tool, be wary of this marketing. VPN is a security tool, nor as much an anonymity one as advertised. Anonymity is better off with Tor.