Download the Foxray app from the App Store:
Add a new xVPN subscription.
Enter any name, copy the link to xVPN subscription from the section Subscriptions.
In case of problems with connection, changing the VPN login or password, you need to update the list of xVPN subscriptions. Swipe left.
Click the Update button. The list of xVPN connections will be updated.
Connect to VPN.
To ensure stable operation of your xVPN connection, change the following settings for each VPN connection you use.
Click on connection.
Change the parameters as in the screenshot.
Repeat these steps for each xVPN connection you use.
Connect to xVPN from the Settings menu as usual in iOS.