I use both Pihole and ublock. While ublock is fine for desktop browser , pihole is useful for mobile devices, as well as blocking access for devices and apps that tend to be chatty with data it sends out. For example - I unfortunately bought a few Eufy security cams long before it was found that Eufy was sending user data out to its AWS instance. It was easy to block that access via AWS in Pihole. Of course, it doesn't always work. I've found some devices absolutely need to call home before they'll function.