Back in May, Opera launched a free unlimited VPN app for iOS, and today the same thing has finally become available for Android devices. You can find it in the Google Play Store. It's simply called Opera Free VPN, and unlike the Norwegian company's other VPN app, Opera Max, this one doesn't compress your traffic or anything like that. It's just a standard VPN app, but free and with unlimited traffic - no subscription needed. It does have a couple of twists, though. First off, it comes with a Wi-Fi test tool that will tell you how secure the wireless network you are currently connected...
Source: http://www.gsmarena.com/opera_finally_brings_its_free_unlimited_vpn_app_to_android-news-20105.php