Greetings all,
Here are three, Android no-root ad blockers, that are all free, easy to use, and have threads over at XDA developers. My favourite is:
https://blockthis.com as I've been an early adopter.
Next, is
Blokada - fire-and-forget ad blocker for Android and very similar to the one above. Both have some settings, like whitelist, and stats for blokada.
This last one is the most comprehensive, but also, collects the most data, for crowd sourcing. Think of it as the Google of adblocker. ( - ; It's all in the privacy statement and terms of service. Which we should always read.
AdClear Ad Blocker for Android
I'm really surprised that more people don't know about these. One of the first adblocker I used was Disconnect when they were just booted from playstore. And then Adgaurd when they were just starting out, and had tried the same thing as Disconnect. Briefly published on playstore. But, they both went to subscription service very quickly. Although they do have some freebies from time to time, the three above, leave to the users generosity. Donate if you can, and or really appreciate their work.
Lastly, don't forget about Tor, on Android you need Orbot app and Orfox browser, but you can proxy all data from other apps thru Orbot's connections. It's not an adblocker, but will give you some anti-tracking protection. Orfox, based on Firefox, gives you the option of choosing add-ons just like Firefox does.