OpenConnect Client APP
There is not needed to have the root access, because the VPN tun device is handled with the VpnService API introduced with Android 4.0 (ICS).
The in-app purchase authorization is used only for voluntary donation to the app development.
* Fingerprint authentication (Require at least Android 6.0)
* Port knocking
* Connect on demand
* Auto connect on boot
* Auto connect/pause/disconnect on WiFi/Mobile/WiMAX up/down
* App filter (Require Android >= 5.0)
* Tasker/Locale plugin
* Widgets
* Android 7.0 quick settings tiles
* Android 7.1 dynamic shortcuts
* Import pem, der, pkcs12 cetfificate formats
* IPv6
* for HTTP/SOCKS proxies
* for customized HTTP headers
* Backup/restore configuration
to the OpenConnect Client community (https://plus.google.com/u/1/communities/117345421668380435608) and you will able to try the beta versions, read the news about the app and much more...