For most app ads it's enough to set a DoT or DoH in the system that blocks ad domains. Android supports this with a settings menu entry, on Apple one needs a mo

For most app ads it's enough to set a DoT or DoH in the system that blocks ad domains. Android supports this with a settings menu entry, on Apple one needs a more "technical" solution I think (loading some XML?). Most VPN apps also support DNS enforcement. Apps like YouTube are an exception, but there are other ways around that on Android.