Free VPNs have earned a bad name over the years, especially in the privacy and security community. And these issues are widely confirmed by security researchers. One in-depth study examined over 270 free VPN mobile apps and confirmed all of the risks above. Here are some key points from the study:
Over 38% of free VPNs contain malware
Over 84% of free VPNs leak user data (IP addresses and/or DNS requests)
75% of free VPNs contain tracking libraries