The Always-on VPN feature
The Kill Switch feature is not supported on Android or iOS. Instead, the ProtonVPN apps on these operating systems protect their users’ data with the Always-on feature. With Always-on, if your device is disconnected from the VPN, the ProtonVPN application reestablishes a secure VPN connection swiftly and automatically. For your protection, the Always-on feature is permanently activated on the iOS app.
For Android users to be protected by Always-on, they must turn it on manually in the app. Android users also have the option to block all network connections if their device loses connection to the VPN.
To access the Always-on menu, follow these instructions:
Navigate to the menu and tap Settings. Then tap the Always On arrow.
To activate Always-on or Block connections without VPN, tap the corresponding switch to the right. When these features are turned on, the switches will appear as they do in this screenshot.
Always-on is available for Android version 7.0 and later.
Block connections without VPN is available for Android version 8.0 and later.
Navigate to the menu and tap Settings.
There you will see the Always-on switch. It is permanently activated.