Re:OpenVPN vs. WireGuard – A Short Comparison
by Mister_Snuggles on Tuesday September 10, 2019 @10:17PM
(#20935964)
I checked in the iOS app store and it looks like a recent update split "Private Tunnel" off into a separate app. As I recall, the old versions included advertising for this private tunnel service.
This is "OpenVPN Connect" by "OpenVPN Technologies".
I don't know what you used, but the official OpenVPN apps are all ad free as far as I can tell.