The best free VPN for Android is Opera VPN, also available for iOS devices.
Opera VPN is powered SurfEasy, which the company acquired in 2015. The app itself is free, but you will find ads tucked away within it. Opera also wants to share anonymous data about your mobile usage and browsing habits with third parties. If you are concerned, here’s what Opera has to say about the data it collects: This information is made available to third parties who are interested in better understanding the mobile ecosystem and how it’s evolving. It’s important to understand that this is not data about what you do with your phone, but rather this is data about how a large group of people use their phones.