Apple

Pi-hole for my whole network, I can WireGuard into it when I'm away.

Pihole on my Debian system with PiVPN WireGuard server.

Safari extensions:
Vinegar to block YouTube ads in Safari. I don’t use the app at all.
Banish to stop websites showing those annoying “open in the app” pop ups.

Ad and nah free bliss.

Seconding AdGuard . It’s really working well for me.

Adguard for Safari is good. I switched to Brave recently as well though.

Wipr + NextDNS

Adguard DNS

NextDNS. Setup on my router so it hits all devices.

Firefox focus. It can be set as ad blocker not just as a history deleting browser. I use Firefox as my main browser on ios, but I don’t really see ads anywhere phone-wide

Installed adguard based on all the good reviews here!

For just Safari the "Roadbock" extension seems to work pretty well.

For safari i use Firefox Klar and Hyperweb as Extensions.

Other than that I have a raspberry pi running WireGuard and Pi-hole, which my phone is constantly connected to. This provides extra security (as all my traffic is encrypted) and privacy. Pi-hole filters out ad and tracking domains.

Another AdGuard user here. I’ve got the paid pro version that allows DNS blocking system wide via the VPN profile method but if you’re just looking for Safari only the free version is good.

I’ve been using Wipr, but the cookie notice blocking is breaking quite a few sites now

I use Adguard as well, especially when I let my YT premium lapse, their extension to play a video PIP with no ads from the share sheet is awesome.

Control D is a great versatile DNS level ad and tracker blocker. You can also route specific services to different exit locations, so stuff like Netflix can think you're in the US.