I have always been an advocate of paid VPN service over free ones in fear of those free VPN providers doing god knows what with my internet trafic that is going through their servers and yesterday I stumbled upon this article about free VPNs doing just that and much more.
Not only do yo have no idea what they are doing with your traffic, but these providers are manipulating google play store search algorithms lol, yo can read the full article here, vpnpro whoever they may be made a deepdive into this an frankly its kind of scarry.