You can download Betternet on your iOS device here.
After downloading the app, you need to launch it and then simply tap on "Install profile" button. For installing the profile you need to enter a 4 digit passcode which is the one you use to unlock your device. Please note that you need to have internet connection on your device. Also make sure that the ISP you are connected to has not blocked VPN connection. The most important thing is to upgrade your device to iOS 8 to have a better performance in the app.
Working with Betternet is ridiculously simple.It only takes 3 steps.
First: Tap ( click) on " Connect " button:
Second: Wait until the app connects
Third: Enjoy surfing anonymalously when the app connects