Ok coz I have a vpn on it
A vpn is fine to use to encrypt your connection, Opera have a good free VPN solution for iOS that also includes ad blocking, I was using Opera for a while but it's speed is a bit slow here in Australia as their nearest server is Singapore.
Adguard has been working well for me with an abundance of filter lists that can be used, I've also just purchased the pro version which allows me to block advertising system wide and now also gives the choice of several DNS servers to use like AdguardDNS - OpenDNS - GoogleDNS etc