I used Pi-hole and AdGuard Home but they of course only work in your home LAN. So I switched to NextDNS and I'm happy (but not very happy) with it. Their DNS servers are fast and I can choose the blocklists to use myself. It also has a white- and blacklist. And the best part is that I don't need an app on my phone to use it.
The only thing that bugs me are (feature) updates. I've been using it for about a year now and I think nothing has changed this entire time. Also they still offer the Energized blocklists which are dead for over a year now. It feels like the devs don't care much about their product as long as it keeps running and people pay for it which is sad.