Recent research has revealed that many VPNs currently installed on Android and iOS are infested with malware of all kinds. Including trojans, spyware, riskware, and adware programs, users face all kinds of risks. And this goes for both free and paid alternatives.
Additional to the inadequate security, some VPNs risk user privacy — the one job they should be doing — by asking all kinds of permissions. Careful analysis by security experts shows the sensitive information these services ask access to even when they only need basic data to safely connect the user to the Internet. Some go as far as demanding access to external storage and precise location.