VPN apps for Android increase privacy and security over the internet since connection data is encrypted, consequently making it impossible for hackers or other parties to access communication data.  They also help unblock region-restricted content through IP address hiding, support anonymity on the Internet, and protect secure information more so when using insecure Wi-Fi. Cybersecurity researcher Simon Migliano at Top10VPN recently discovered that free Android VPNs are suffering encryption failures.

Source: GBHackers