VPNs are a great way to browse the Web anonymously and access region-locked sites. Such apps are very easy to use on Android devices; but you need to be careful.

A group of researchers from UC Berkeley, CSIRO’s Data61, UNSW Sydney, and Malaysia’s UCSI looked into the 283 such apps, and found out that a large number of VPNs were insecure, leaked user data, injected ads and also contained malware.

According to the researchers, “While 37 percent of the analyzed VPN apps have more than 500K installs and 25 percent of them receive at least a 4-star rating, over 38 percent of them contain some malware presence according to VirusTotal.”

18 percent of the VPN apps the researchers tested didn’t encrypt users’ Web traffic. 16 percent routed traffic through other users’ devices; means you could be unknowingly facilitating the transmission of illegal content through your connection.

10 Worst Offenders

Even though there are many insecure VPNs, according to the researchers – but you will want to avoid the worst among those. Below are the 10 most insecure Android VPN apps.

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10 worst Android VPNs

Users should avoid using the VPNs that are new in the market. Use such apps which have been there for years; even if you have to pay. Your privacy and data security should be the first priority.